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{{short description|Small, low-power cellular base station}}

In [[telecommunications]], a '''femtocell''' is a small, low-power [[cellular base station]], typically designed for use in a home or small business. A broader term which is more widespread in the industry is ''[[small cell]]'', with ''femtocell'' as a subset. It typically connects to the service provider's network via the Internet through a wired broadband link (such as [[digital subscriber line|DSL]] or [[cable television|cable]]); current designs typically support four to eight simultaneously active mobile phones in a residential setting depending on version number and femtocell hardware, and eight to sixteen mobile phones in enterprise settings. A femtocell allows service providers to extend service coverage indoors or at the cell edge, especially where access would otherwise be limited or unavailable. Although much attention is focused on [[W-CDMA|WCDMA]], the concept is applicable to all standards, including [[GSM]], [[CDMA2000]], [[TD-SCDMA]], [[WiMAX]] and [[LTE (telecommunication)|LTE]] solutions.

[[File:Femtocells.jpg|thumb|right|Verizon and AT&T femtocell access points]]

The use of femtocells allows network coverage in places where the signal to the main network cells might be too weak. Furthermore, femtocells lower contention on the main network cells, by forming a connection from the end user, through an internet connection, to the operator's private network infrastructure elsewhere. The lowering of contention to the main cells plays a part in [[Cell breathing (telephony)|breathing]], where connections are offloaded based on physical distance to cell towers.

Consumers and small businesses benefit from greatly improved coverage and signal strength since they have a ''de facto'' base station inside their premises. As a result of being relatively close to the femtocell, the mobile phone (user equipment) expends significantly less power for communication with it, thus increasing battery life. They may also get better voice quality (via [[Wideband audio|HD voice]]) depending on a number of factors such as operator/network support, customer contract/price plan, phone and operating system support. Some carriers may also offer more attractive tariffs, for example discounted calls from home.

Femtocells are an alternative way to deliver the benefits of [[fixed–mobile convergence]] (FMC). The distinction is that most FMC architectures require a new dual-mode handset which works with existing unlicensed spectrum home/enterprise [[wireless access point]]s, while a femtocell-based deployment will work with existing handsets but requires the installation of a new access point that uses licensed spectrum.

Many operators worldwide offer a femtocell service, mainly targeted at businesses but also offered to individual customers (often for a one-off fee) when they complain to the operator regarding a poor or non-existent signal at their location. Operators who have launched a femtocell service include [[SFR]], [[AT&T]], [[C Spire Wireless|C Spire]], [[Sprint Nextel]], [[Verizon]], [[Zain Group|Zain]], [[Mobile TeleSystems]], [[T-Mobile US]], [[Orange S.A.|Orange]], [[Vodafone]], [[EE (telecommunications)|EE]], [[O2 (UK)|O2]], [[Hutchison 3G|Three]], and others.

In [[3GPP]] terminology, a [[Home NodeB]] (HNB) is a 3G femtocell. A [[Home eNodeB]] (HeNB) is an [[LTE (telecommunication)|LTE 4G]] femtocell.

Theoretically the range of a [[GSM#Base station subsystem|standard base station]] may be up to {{convert|35|km|mi|abbr=off}}, and in practice could be {{convert|5|–|10|km|mi|abbr=on}}, a [[microcell]] is less than two kilometers wide, a [[picocell]] is 200 meters or less, and a femtocell is in the order of 10 meters,<ref>{{cite web |author=Dimitris Mavrakis |url=http://www.visionmobile.com/blog/2007/12/do-we-really-need-femto-cells/ |title=Do we really need femto cells? |publisher=VisionMobile |date=2007-12-01 |access-date=2012-07-26 |archive-url=https://web.archive.org/web/20110416235037/http://www.visionmobile.com/blog/2007/12/do-we-really-need-femto-cells/ |archive-date=2011-04-16 |url-status=dead }}</ref> although AT&T calls its product, with a range of {{convert|40|ft|m}}, a "microcell".<ref>{{cite web |url=http://www.wireless.att.com/learn/why/3gmicrocell/faq.jsp |title=AT&T 3G MicroCell - Wireless Signal Booster |publisher=Wireless from AT&T |access-date=2012-07-26 |archive-url=https://web.archive.org/web/20100221133651/http://www.wireless.att.com/learn/why/3gmicrocell/faq.jsp |archive-date=2010-02-21 |url-status=dead }}</ref> AT&T uses "AT&T 3G MicroCell" as a trademark and not necessarily the "microcell" technology, however.<ref>{{cite web |url=http://www.wireless.att.com/learn/why/3gmicrocell/faq.jsp |title=AT&T 3G MicroCell - Wireless Signal Booster - Wireless from AT&T |publisher=Wireless.att.com |access-date=2014-03-17 |archive-url=https://web.archive.org/web/20100221133651/http://www.wireless.att.com/learn/why/3gmicrocell/faq.jsp |archive-date=2010-02-21 |url-status=dead }}</ref>

== Overview and benefits ==

=== Operating mode ===
Femtocells are sold or loaned by a [[mobile network operator]] (MNO) to its residential or enterprise customers. A femtocell is typically the size of a [[residential gateway]] or smaller, and connects to the user's [[broadband]] line. Integrated femtocells (which include both a DSL router and femtocell) also exist. Once plugged in, the femtocell connects to the MNO's mobile network, and provides extra coverage. From a user's perspective, it is [[plug and play]], there is no specific installation or technical knowledge required—anyone can install a femtocell at home.

In most cases,<ref>{{cite web |last=Gabriel |first=Caroline |url=http://www.rethink-wireless.com/2010/06/30/softbank-offer-femtocells-free.htm |title=Softbank to offer femtocells for free |publisher=Rethink Wireless |date=2010-06-30 |access-date=2012-07-26 |archive-url=https://web.archive.org/web/20110715175341/http://www.rethink-wireless.com/2010/06/30/softbank-offer-femtocells-free.htm |archive-date=2011-07-15 |url-status=dead }}</ref> the user must then declare which mobile phone numbers are allowed to connect to their femtocell, usually via a web interface provided by the MNO.<ref>{{cite web |url= http://campaigns.vodafone.co.uk/sure-signal-1/ |access-date= 2010-12-21 |title= Vodafone UK SureSignal Registration Webpage |publisher= Vodafone |archive-url= https://web.archive.org/web/20110721040417/http://campaigns.vodafone.co.uk/sure-signal-1/ |archive-date= 2011-07-21 |url-status= dead }}</ref> This needs to be done only once. When these mobile phones arrive under coverage of the femtocell, they switch over from the [[macrocell]] (outdoor) to the femtocell automatically. Most MNOs provide a way for the user to know this has happened, for example by having a different network name appear on the mobile phone. All communications will then automatically go through the femtocell. When the user leaves the femtocell coverage (whether in a call or not) area, their phone hands over seamlessly to the macro network. Femtocells require specific hardware, so existing WiFi or DSL routers cannot be upgraded to a femtocell.

Once installed in a specific location, most femtocells have protection mechanisms so that a location change will be reported to the MNO. Whether the MNO allows femtocells to operate in a different location depends on the MNO's policy. International location change of a femtocell is not permitted because the femtocell transmits licensed frequencies which belong to different network operators in different countries.

=== Benefits for users ===
The main benefits for an end user are the following:

* "5 bar" coverage when there is no existing signal or poor coverage
* Higher mobile data capacity, which is important if the end-user makes use of mobile data on their mobile phone (may not be relevant to a large number of subscribers who instead use [[WiFi]] where femtocell is located)
* Depending on the pricing policy of the MNO, special tariffs at home can be applied for calls placed under femtocell coverage
* For enterprise users, having femtos instead of [[DECT]] ("cordless" home) phones enables them to have a single phone, so a single contact list, etc.
* Improved battery life for mobile devices due to reduced transmitter–receiver distance
* The battery draining issue of mobile operators can be eliminated by means of energy efficiency of the networks resulting in prolongation of the battery life of handsets<ref>{{Cite journal |last1=Ghosh |first1=J. |last2=Dhar Roy |first2=S. |date=2015 |title=Qualitative analysis for coverage probability and energy efficiency in cognitive-femtocell networks under macrocell infrastructure |url=https://figshare.com/articles/preprint/Qualitative_analysis_for_coverage_probability_and_energy_efficiency_in_cognitive-femtocell_networks_under_macrocell_infrastructure/13704454/1/files/26329696.pdf |journal=Electronics Letters |language=en |volume=51 |issue=17 |pages=1378–1380 |doi=10.1049/el.2015.0171|bibcode=2015ElL....51.1378G }}</ref>
* New applications and services can be created to enhance user experience or provide additional features:
** In [[Connected car]] case the use of Femtocells has been proposed as a safety feature (cf. patent application EP2647257B1 by Valentin A. Alexeev<ref>{{cite web|url=https://patents.google.com/patent/EP2647257B1|title=Femtocell base station providing communication services based on a car's sensor information|access-date=2019-04-09|archive-date=2021-02-24|archive-url=https://web.archive.org/web/20210224160635/https://patents.google.com/patent/EP2647257B1|url-status=live}}</ref>)

Femtocells can be used to give coverage in rural areas.

== Standardised architectures ==
[[File:NodeB HNB.svg|thumb|450px|Simplified version of traditional Node B and Home Node B (3G femtocell) in 3G architecture]]
[[File:Logo of the Femto Forum.svg|thumb|The Femto Forum was founded to promote the use of femtocells]]
The standards bodies have published formal specifications for femtocells for the most popular technologies, namely [[WCDMA]], [[CDMA2000]], [[3GPP Long Term Evolution|LTE]] and [[WiMAX]]. These all broadly conform to an architecture with three major elements:

# The femtocell access points themselves, which embody greater network functionality than found in macrocell basestations, such as the radio resource control functions. This allows much greater autonomy within the femtocell, enabling self-configuration and self-optimisation. Femtocells are connected using broadband IP, such as DSL or cable modems, to the network operator's core switching centres.
# The femtocell gateway, comprising a security gateway that terminates large numbers of encrypted IP data connections from hundreds of thousands of femtocells, and a signalling gateway which aggregates and validates the signalling traffic, authenticates each femtocell and interfaces with the mobile network core switches using standard protocols, such as Iuh.
# The management and operational system which allows software updates and diagnostic checks to be administered. These typically use the same [[TR-069]] management protocol published by the [[Broadband Forum]] and also used for administration of residential modems.

The key interface in these architectures is that between the femtocell access points and the femtocell gateway. Standardisation enables a wider choice of femtocell products to be used with any gateway, increasing competitive pressure and driving costs down. For the common WCDMA femtocells, this is defined as the Iuh interface. In the Iuh architecture, the femtocell gateway sits between the femtocell and the core network and performs the necessary translations to ensure the femtocells appear as a radio network controller to existing [[mobile switching centre]]s (MSCs). Each femtocell talks to the femtocell gateway and femtocell gateways talk to the Core Network Elements (CNE) (MSC for [[Circuit switching|circuit-switched]] calls, [[SGSN]] for [[Packet switching|packet-switched]] calls). This model was proposed by 3GPP and the Femto Forum.<ref>{{citation |url=http://www.quintillion.co.jp/3GPP/Specs/25467-810.pdf |title=3GPP TS 25.467 V8.2.0 UTRAN architecture for 3G Home Node B (HNB) |access-date=2011-04-18 |archive-url=https://web.archive.org/web/20120319194415/http://www.quintillion.co.jp/3GPP/Specs/25467-810.pdf |archive-date=2012-03-19 |url-status=dead }}</ref> New protocols ([[HNBAP]] and RUA<ref name="ReferenceA">RUA is a Sigtran type protocol used to carry [[Radio Access Network Application Part]] (RANAP) signalling over the IP based Iu-h interface. Like that of the other Sigtran adaptation protocols, RUA also uses the services of SCTP ([[Stream Control Transmission Protocol]]) on top of IP.</ref> [RANAP User Adaptation]) have been derived; HNBAP is used for the control signaling between the HNB and HNB-GW<ref>{{citation |url=http://www.arib.or.jp/IMT-2000/V720Mar09/2_T63/ARIB-STD-T63/Rel8/25/A25469-800.pdf |title=3GPP TS 25.469 V8.2.0 Home Node B Application Part (HNBAP) signaling |access-date=2011-04-18 |archive-date=2011-09-04 |archive-url=https://web.archive.org/web/20110904081509/http://www.arib.or.jp/IMT-2000/V720Mar09/2_T63/ARIB-STD-T63/Rel8/25/A25469-800.pdf |url-status=live }}</ref> while RUA<ref name="ReferenceA"/> is a lightweight mechanism to replace the [[Signalling Connection Control Part]] (SCCP) and [[M3UA]] protocols in the [[Radio Network Controller]] (RNC); its primary function is transparent transfer of RANAP messages.<ref>{{citation|url=http://www.arib.or.jp/IMT-2000/V730Jul09/5_Appendix/Rel8/25/25468-810.pdf|title=3GPP TS 25.468 V8.1.0 UTRAN Iuh Interface RANAP User Adaption (RUA) signalling|access-date=2011-04-18|archive-date=2011-09-04|archive-url=https://web.archive.org/web/20110904081547/http://www.arib.or.jp/IMT-2000/V730Jul09/5_Appendix/Rel8/25/25468-810.pdf|url-status=dead}}</ref>

In March 2010, the Femto Forum and ETSI conducted the first [[Plugfest]] to promote interoperability of the Iuh standard.<ref>{{citation |url=http://www.femtoforum.org/femto/pressreleases.php?id=137 |title=Femtocell Plugfest |access-date=2010-12-19 |publisher=Femto Forum |archive-url=https://web.archive.org/web/20100707013732/http://www.femtoforum.org/femto/pressreleases.php?id=137 |archive-date=2010-07-07 |url-status=usurped }}</ref>

The CDMA2000 standard released in March 2010<ref>{{cite web |url= http://www.3gpp2.org/public_html/news/3GPP2_Femto_Specs_031010.pdf |title= 3GPP2 Femtocell Standard Released |access-date= 2010-12-19 |publisher= 3GPP2 |archive-url= https://web.archive.org/web/20110516121027/http://www.3gpp2.org/public_html/news/3GPP2_Femto_Specs_031010.pdf |archive-date= 2011-05-16 |url-status= dead }}</ref> differs slightly by adopting the [[Session Initiation Protocol]] (SIP) to set up a connection between the femtocell and a femtocell convergence server (FCS). Voice calls are routed through the FCS which emulates an MSC. SIP is not required or used by the mobile device itself. In the SIP architecture, the femtocell connects to a core network of the mobile operator that is based on the SIP/IMS architecture. This is achieved by having the femtocells behave toward the SIP/IMS network like a SIP/IMS client by converting the circuit-switched 3G signaling to SIP/IMS signaling, and by transporting the voice traffic over RTP as defined in the [[IETF]] standards.

== Air interfaces ==
Although much of the commercial focus seems to have been on the [[Universal Mobile Telecommunications System]] (UMTS), the concept is equally applicable to all air-interfaces. Indeed, the first commercial deployment was the [[CDMA2000]] Airave in 2007 by Sprint.

Femtocells are also under development or commercially available for [[GSM]], [[TD-SCDMA]], [[WiMAX]] and [[3GPP Long Term Evolution|LTE]].

The H(e)NB functionality and interfaces are basically the same as for regular [[High Speed Packet Access]] (HSPA) or LTE base stations except few additional functions. The differences are mostly to support differences in access control to support closed access for residential deployment or open access for enterprise deployment, as well as handover functionality for active subscribers and cell selection procedures for idle subscribers. For LTE additional functionality was added in 3GPP Release 9 which is summarized in.<ref>{{cite web |url=http://www.nomor.de/home/technology/white-papers/lte-home-node-bs-and-its-enhancements-in-release-9 |title=Nomor Research: LTE Home Node Bs and its Enhancements in Release 9 |publisher=Nomor.de |access-date=2012-07-26 |archive-date=2010-10-07 |archive-url=https://web.archive.org/web/20101007092756/http://www.nomor.de/home/technology/white-papers/lte-home-node-bs-and-its-enhancements-in-release-9 |url-status=live }}</ref>

== Issues ==

=== Interference ===
The placement of a femtocell has a critical effect on the performance of the wider network, and this is the key issue to be addressed for successful deployment. Because femtocells can use the same frequency bands as the conventional cellular network, there has been the worry that rather than improving the situation they could potentially cause problems.

Femtocells incorporate interference mitigation techniques—detecting macrocells, adjusting power<ref>X. Kang et al. ``[https://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=6171995&queryText%3DPrice-based+resource+allocation+for+spectrum-sharing+femtocell+networks%3A+a+Stackelberg+game+approach Price-based resource allocation for spectrum-sharing femtocell networks: a Stackelberg game approach] ,'' in IEEE Journal on Selected Areas in Communications, vol. 30, no. 3, pp. 538-549, Apr. 2012.</ref> and scrambling codes accordingly. Ralph de la Vega, AT&T President, reported in June 2011 they recommended against using femtocells where signal strength was middle or strong because of interference problems they discovered after widescale deployment.<ref>de la Vega, Ralph [http://allthingsd.com/20110624/ralph-de-la-vega-says-att-can-better-as-it-gets-bigger-the-full-d9-interview-video/?refcat=d9] {{Webarchive|url=https://web.archive.org/web/20110703055931/http://allthingsd.com/20110624/ralph-de-la-vega-says-att-can-better-as-it-gets-bigger-the-full-d9-interview-video/?refcat=d9 |date=2011-07-03 }}, ''All Things D video interview 38 minutes in'', June 24, 2011, accessed June 28, 2011.</ref> This differs from previous opinions expressed by AT&T and others.

A good example is the comments made by Gordon Mansfield, executive director of RAN Delivery, AT&T, speaking at the Femtozone at CTIA March 2010:
<blockquote>
We have deployed femtocells co-carrier with both the hopping channels for GSM macrocells and with UMTS macrocells. Interference isn't a problem. We have tested femtocells extensively in real customer deployments of many thousands of femtocells, and we find that the mitigation techniques implemented successfully minimise and avoid interference. The more femtocells you deploy, the more uplink interference is reduced.
</blockquote>

The Femto Forum has some extensive reports on this subject, which have been produced together with 3GPP and 3GPP2.<ref>{{usurped|1=[https://web.archive.org/web/20090804082632/http://www.femtoforum.org/femto/index.php?id=69 Interference management in UMTS femtocells — complete paper]}}, February 2010</ref><ref>{{usurped|1=[https://web.archive.org/web/20090804082632/http://www.femtoforum.org/femto/index.php?id=69 Interference management in UMTS femtocells — summary paper]}}, February 2010</ref>

To quote from the ''Summary Paper — Summary of Findings'':

<blockquote>
The simulations performed in the Femto Forum WG2 and 3GPP RAN4 encompass a wide spectrum of
possible deployment scenarios including shared channel and dedicated channel deployments. In addition, the
studies looked at the impact in different morphologies, as well as in closed versus open access. The following
are broad conclusions from the studies:
:1. When femtocells are used in areas of poor or no coverage, macro/femto interference is unlikely to be a problem.
:2. If the femto network is sharing the channel (co-channel) with the macro network, interference can occur. However, if the interference management techniques advocated by the Femto Forum are adopted, the resulting interference can be mitigated in most cases.
:3. A femtocell network deployed on an adjacent dedicated channel is unlikely to create interference to a macro network. Additionally, the impact of a macro network on the performance of a femtocell on an adjacent channel is limited to isolated cases. If the interference mitigation techniques advocated by the Femto Forum are used, the impact is further marginalised.
:4. Closed access represents the worst-case scenario for creation of interference. Open access reduces the chances of User Equipment (mobile phone handsets, 3G data dongles, etc.) on the macro network interfering with a proximate femtocell.
:5. The same conclusions were reached for both the 850 MHz (3GPP Band 17) and 2100 MHz (3GPP Band 1) deployments that were studied.

The conclusions are common to the 850 MHz and 2100 MHz bands that were simulated in the studies, and can be
extrapolated to other mobile bands. With interference mitigation techniques successfully implemented, simulations show
that femtocell deployments can enable very high capacity networks by providing between a 10 and 100 times
increase in capacity with minimal deadzone impact and acceptable noise rise.

Femtocells can also create a much better user experience by enabling substantially higher data rates than can be obtained with a macro network and net throughputs that will be ultimately limited by backhaul in most cases (over 20 Mbps in 5 MHz).
</blockquote>

=== Lawful interception ===
Access point base stations, in common with all other public communications systems, are required to comply with [[lawful interception]] requirements in most countries.

=== Equipment location ===
Other regulatory issues<ref name="fcc.gov">{{cite web |url=http://www.fcc.gov/pshs/services/911-services/voip/challenges.html |title=FCC requirements for 911 provision by VoIP providers |publisher=Fcc.gov |access-date=2012-07-26 |archive-date=2011-04-29 |archive-url=https://web.archive.org/web/20110429092434/http://www.fcc.gov/pshs/services/911-services/voip/challenges.html |url-status=live }}</ref> relate to the requirement in most countries for the operator of a network to be able to show exactly where each base-station is located, and for [[E911]] requirements to provide the registered location of the equipment to the emergency services. There are issues in this regard for access point base stations sold to consumers for home installation, for example. Further, a consumer might try to carry their base station with them to a country where it is not licensed. Some manufacturers are using [[GPS]] within the equipment to lock the femtocell when it is moved to a different country;<ref name="Hands on with the Samsung Ubicell">{{cite web |url=https://www.engadget.com/2007/03/28/hands-on-with-the-samsung-ubicell/ |title=Hands on with the Samsung Ubicell |publisher=Engadget.com |access-date=2012-07-26 |archive-date=2012-12-06 |archive-url=https://web.archive.org/web/20121206192747/http://www.engadget.com/2007/03/28/hands-on-with-the-samsung-ubicell/ |url-status=live }}</ref> this approach is disputed {{Citation needed|date=March 2011}}, as GPS is often unable to obtain position indoors because of weak signal.

=== Emergency calls ===
Access Point Base Stations are also required, since carrying voice calls, to provide a [[9-1-1|911]] (or [[999 (emergency telephone number)|999]], [[1-1-2|112]], [[emergency telephone number|etc.]]) emergency service, as is the case for [[VoIP]] phone providers in some jurisdictions.<ref name="fcc.gov"/> This service must meet the same requirements for availability as current wired telephone systems, such as functioning during a power failure. There are several ways to achieve this, such as alternative power sources or fallback to existing telephone infrastructure.

=== Quality of service ===
When using an [[Ethernet]] or [[ADSL]] home backhaul connection, an Access Point Base Station must either share the backhaul bandwidth with other services, such as Internet browsing, gaming consoles, [[set-top boxes]] and [[triple play (telecommunications)|triple-play]] equipment in general, or alternatively directly replace these functions within an integrated unit. In shared-bandwidth approaches, which are the majority of designs currently being developed, the effect on [[quality of service]] may be an issue.

The uptake of femtocell services will depend on the reliability and quality of both the cellular operator's network and the third-party broadband connection, and the broadband connection's subscriber understanding the concept of bandwidth utilization by different applications a subscriber may use. When things go wrong, subscribers will turn to cellular operators for support even if the root cause of the problem lies with the broadband connection to the home or workplace. Hence, the effects of any third-party ISP broadband network issues or traffic management policies need to be very closely monitored and the ramifications quickly communicated to subscribers.

A key issue recently identified is active [[traffic shaping]] by many ISPs on the underlying transport protocol [[IPSec]].{{Citation needed|date=June 2015}}

=== Spectrum accuracy ===
To meet [[Federal Communications Commission]] (FCC) / [[Ofcom]]<!-- Ofcom now does the work of the old UK Radio Authority --> [[spectral mask|spectrum mask]] requirements, femtocells must generate the [[radio frequency]] signal with a high degree of precision. To do this over a long period of time is a major technical challenge. The solution to this problem is to use an external, accurate signal to constantly calibrate the oscillator to ensure it maintains its accuracy. This is not simple (broadband backhaul introduces issues of network jitter/wander and recovered clock accuracy), but technologies such as the [[IEEE 1588]] time synchronisation standard may address the issue. Also, [[Network Time Protocol]] (NTP) is being pursued by some developers as a possible solution to provide frequency stability. Conventional (macrocell) base stations often use GPS timing for synchronization and this could be used,<ref name="Hands on with the Samsung Ubicell"/> although there are concerns on cost and the difficulty of ensuring good GPS coverage.

Standards bodies have recognized the challenge of this and the implications on device cost. For example, 3GPP has relaxed the 50ppb [[parts per billion]] precision to 100ppb for indoor base stations in Release 6 and a further loosening to 250ppb for Home Node B in Release 8.

===Security===

At the 2013 Black Hat hacker conference in Las Vegas, NV, a trio of security researchers detailed their ability to use a Verizon femtocell to secretly intercept the voice calls, data, and SMS text messages of any handset that connects to the device.

During a demonstration of their exploit, they showed how they could begin recording audio from a cell phone even before the call began. The recording included both sides of the conversation. They also demonstrated how it could trick Apple's iMessage–which encrypts texts sent over its network using SSL to render them unreadable to snoopers, to SMS—allowing the femtocell to intercept the messages.
 
They also demonstrated it was possible to "clone" a cell phone that runs on a CDMA network by remotely collecting its device ID number through the femtocell, in spite of added security measures to prevent against cloning of CDMA phones.<ref>{{Cite web|url = http://www.digitaltrends.com/mobile/femtocell-verizon-hack/|title = Femtocells: The $250 device that lets hackers take over your phone|date = August 2013|access-date = 2015-04-13|archive-date = 2015-04-13|archive-url = https://web.archive.org/web/20150413150646/http://www.digitaltrends.com/mobile/femtocell-verizon-hack/|url-status = live}}</ref>

== Controversy on consumer proposition ==
The impact of a femtocell is most often to improve cellular coverage, without the cellular carrier needing to improve their infrastructure (cell towers, etc.). This is net gain for the cellular carrier. However, the user must provide and pay for an internet connection to route the femtocell traffic, and then (usually) pay an additional one-off or monthly fee to the cellular carrier. Some have objected to the idea that consumers are being asked to pay to help relieve network shortcomings.<ref>{{cite web |url=http://jkontherun.com/2009/09/21/femtocells-are-great-but-the-payment-model-is-backwards/ |title=Femtocells Are Great, but the Payment Model is Backwards — Mobile Technology News |publisher=Jkontherun.com |date=2009-09-21 |access-date=2012-07-26 |archive-url=https://web.archive.org/web/20101022230257/http://jkontherun.com/2009/09/21/femtocells-are-great-but-the-payment-model-is-backwards/ |archive-date=October 22, 2010 |url-status=dead }}</ref>  On the other hand, residential femtocells normally provide a ‘personal cell’ which provides benefits only to the owner's family and friends.<ref>{{cite web|title=Benefits of residential femtocells|url=http://www.alcatel-lucent.com/wireless/images/what-is-a-femtocell-infographic.jpg|work=Benefits of residential femto cells (info graphic)|publisher=[[Alcatel-Lucent]]|access-date=2011-07-05|archive-date=2011-11-28|archive-url=https://web.archive.org/web/20111128102310/http://www.alcatel-lucent.com/wireless/images/what-is-a-femtocell-infographic.jpg|url-status=live}}</ref>

The difference is also that while mobile coverage is provided through subscriptions from an operator with one business model, a fixed fibre or cable may work with a completely different business model. For example, mobile operators may imply restrictions on services which an operator on a fixed may not. Also, WiFi connects to a local network such as home servers and media players. This network should possibly not be within reach of the mobile operator.

== Deployment ==
According to market research firm Informa and the Femto Forum,<ref>{{cite web |url= http://www.femtoforum.org/femto/pdfs01.php |title= Femtocell Market Status Report |access-date= 2010-12-19 |publisher= Femto Forum |archive-url= https://web.archive.org/web/20101218195009/http://www.femtoforum.org/femto/pdfs01.php |archive-date= 2010-12-18 |url-status= usurped }}</ref> as of December 2010 18 operators have launched commercial femtocell services, with a total of 30 committed to deployment.

At the end of 2011, femtocell shipments had reached roughly 2 million units deployed annually, and the market is expected to grow rapidly with distinct segments for consumer, enterprise, and carrier-grade femtocell deployments.<ref>{{cite web |url= http://mobile-experts.net/product_info.php?products_id=41 |title= Femtocell Forecast 2011 |access-date= 2011-12-05 |publisher= Mobile Experts |archive-date= 2011-09-18 |archive-url= https://web.archive.org/web/20110918223249/http://mobile-experts.net/product_info.php?products_id=41 |url-status= dead }}</ref> Femtocell shipments are estimated to have reached almost 2 million at the end of 2010.<ref>{{cite web |url= http://www.isuppli.com/Mobile-and-Wireless-Communications/News/Pages/Femtocell-Base-Stations-Poised-for-Spectacular-Growth.aspx |title= Femtocell forecast 2010 |access-date= 2010-12-19 |publisher= iSuppli |archive-date= 2011-01-29 |archive-url= https://web.archive.org/web/20110129223402/http://www.isuppli.com/mobile-and-wireless-communications/news/pages/femtocell-base-stations-poised-for-spectacular-growth.aspx |url-status= live }}</ref> Research firm Berg Insight estimates that the shipments will grow to 12 million units worldwide in 2014.<ref>{{cite web |url=http://berginsight.com/News.aspx?m_m=6&s_m=1 |title=Berg Insight forecasts 70 million users of femtocells worldwide by 2014 |publisher=Berginsight.com |access-date=2012-07-26 |archive-date=2004-08-05 |archive-url=https://web.archive.org/web/20040805144012/http://berginsight.com/News.aspx?m_m=6&s_m=1 |url-status=live }}</ref>

Within the United States, Cellcom (Wisconsin), was the first CDMA carrier in the U.S. to be a member of the non-profit organization founded in 2007 to promote worldwide femtocell deployment. In 2009, Cellcom received the first Femtocell Industry Award for significant progress or commercial launch by a small carrier at the Femtocells World Summit in London. Additional significant deployments within the United States were by [[Sprint Nextel]], [[Verizon Wireless]] and [[AT&T Wireless]]. Sprint started in the third quarter of 2007 as a limited rollout ([[Denver]] and [[Indianapolis]]) of a home-based femtocell built by Samsung Electronics called the Sprint Airave that works with any Sprint handset.<ref name=Sprint>{{cite web |url= https://gizmodo.com/300451/sprintsamsung-instant-cell+to+wi+fi-box-is-official-named-airave |title= Sprint Airave is officially named |access-date= 2010-12-21 |archive-date= 2009-09-21 |archive-url= https://web.archive.org/web/20090921043444/http://gizmodo.com/300451/sprintsamsung-instant-cell+to+wi+fi-box-is-official-named-airave |url-status= live }}</ref> From 17 August 2008, the Airave was rolled out on a nationwide basis. Other operators in the United States have followed suit. In January 2009, Verizon rolled out its Wireless Network Extender, based on the same design as the Sprint/Samsung system.<ref>{{cite web |url=http://www.thinksmallcell.com/Femtocell-Operator/verizon-following-sprint-with-voice-oriented-2g-cdma-femtocell-solving-poor-coverage.html |title= Verizon follows Sprint with 2G CDMA femtocell | access-date= 2010-12-21 |publisher= ThinkSmallcell|archive-url= https://web.archive.org/web/20130718084157/http://www.thinksmallcell.com/Femtocell-Operator/verizon-following-sprint-with-voice-oriented-2g-cdma-femtocell-solving-poor-coverage.html |archive-date= 2013-07-18 }}</ref> In late March 2010, AT&T announced nationwide roll-out of its 3G MicroCell, which commenced in April. The equipment is made by [[Cisco Systems]] and [[ip.access]], and was the first 3G femtocell in US, supporting both voice and data [[High Speed Packet Access|HSPA]].<ref name="ATT">[http://localtechwire.com/business/local_tech_wire/news/blogpost/6090688/ AT&T chooses Raleigh, Charlotte for 3G MicroCell trial] {{Webarchive|url=https://web.archive.org/web/20100103171829/http://localtechwire.com/business/local_tech_wire/news/blogpost/6090688/ |date=2010-01-03 }}, ''Local Tech Wire.com'', September 28, 2009</ref> Both Sprint<ref>{{cite web |url= http://www.intomobile.com/2010/08/20/sprints-3g-airave-now-shipping-to-qualified-customers/ |title= Sprint 3G Airave now shipping |access-date= 2010-12-21 |archive-url= https://web.archive.org/web/20110111044217/http://www.intomobile.com/2010/08/20/sprints-3g-airave-now-shipping-to-qualified-customers/ |archive-date= 2011-01-11 |url-status= dead }}</ref> and Verizon<ref>{{cite web |url= https://www.engadget.com/2010/10/19/verizon-rolls-out-3g-network-extender-for-250/ |title= Verizon rolls out 3G network extender |access-date= 2010-12-21 |publisher= engadget |archive-date= 2010-10-22 |archive-url= https://web.archive.org/web/20101022050720/http://www.engadget.com/2010/10/19/verizon-rolls-out-3g-network-extender-for-250 |url-status= live }}</ref> upgraded to 3G CDMA femtocells during 2010, with capacity for more concurrent calls and much higher data rates. In November 2015, T-Mobile US began deployment of 4G LTE femtocells manufactured by [[Alcatel Lucent]].

In Asia, several service providers have rolled out femtocell networks. In Japan, [[SoftBank Mobile|SoftBank]] launched its residential 3G femtocell service in January 2009<ref>{{cite web |url=http://www.telecoms.com/5420/japans-softbank-first-to-launch-3g-femtocells/ |title=Japan's SoftBank first to launch 3G femtocells |publisher=Telecoms.com |date=2008-09-22 |access-date=2012-07-26 |archive-date=2012-06-29 |archive-url=https://web.archive.org/web/20120629165137/http://www.telecoms.com/5420/japans-softbank-first-to-launch-3g-femtocells/ |url-status=live }}</ref> with devices provided by Ubiquisys. In the same year, the operator launched a project to deploy femtocells to deliver outdoor services in rural environments where existing coverage is limited. In May 2010, SoftBank Mobile launched the first free femtocell offer, providing open access femtocells free of charge to its residential and business customers. In Singapore, Starhub rolled out its first nationwide commercial 3G femtocell services with devices provided by [[Huawei Technologies]], though the uptake is low, while Singtel's offering is targeted at small medium enterprises. In 2009, China Unicom announced its own femtocell network.<ref>{{cite web|url=http://www.thinksmallcell.com/Latest/china-unicom-becomes-7th-operator-to-launch-femtocells-commercially.html |title=China Unicom Femtocell launch |publisher=ThinkSmallCell.com |date=2009-11-01 |archive-url=https://web.archive.org/web/20130709165608/http://www.thinksmallcell.com/Latest/china-unicom-becomes-7th-operator-to-launch-femtocells-commercially.html |access-date=2012-07-26|archive-date=2013-07-09 }}</ref> NTT DoCoMo in Japan launched their own femtocell service on 10 November 2009.

In July 2009, Vodafone released the first femtocell network in Europe,<ref>[http://www.networkworld.com/news/2009/062409-vodafone-to-launch-3g-femtocell.html Vodafone Femtocell launch] {{webarchive|url=https://web.archive.org/web/20131017165211/http://www.networkworld.com/news/2009/062409-vodafone-to-launch-3g-femtocell.html |date=2013-10-17 }}</ref> the Vodafone Access Gateway provided by Alcatel-Lucent.<ref>{{cite web |last=Ray |first=Bill |url=http://www.reghardware.co.uk/2009/10/05/review_networking_vodafone_access_gateway/ |title=Vodafone Access Gateway 3G |publisher=Reghardware.co.uk |date=2009-10-05 |access-date=2012-07-26 |archive-url=https://web.archive.org/web/20100505061616/http://www.reghardware.co.uk/2009/10/05/review_networking_vodafone_access_gateway/ |archive-date=2010-05-05 |url-status=dead }}</ref> This was rebranded as SureSignal in January 2010,<ref>{{cite web |url= http://www.3g.co.uk/PR/Jan2010/Boost-Your-3G-Signal-With-Vodafone-Sure-Signal-3G.html |title= Boost your signal with Vodafone Sure Signal |access-date= 2010-12-21 |archive-date= 2010-12-25 |archive-url= https://web.archive.org/web/20101225010516/http://www.3g.co.uk/PR/Jan2010/Boost-Your-3G-Signal-With-Vodafone-Sure-Signal-3G.html |url-status= live }}</ref> after which Vodafone also launched service in Spain, Greece, New Zealand,<ref>{{cite web|url=http://www.vodafone.co.nz/network/coverage/|title=Mobile coverage|publisher=Vodafone|access-date=2013-07-05|archive-date=2013-07-17|archive-url=https://web.archive.org/web/20130717103251/http://www.vodafone.co.nz/network/coverage/|url-status=live}}</ref><ref>{{cite web |url= http://www.techjungle.com/7528 |title= Vodafone launch 3G Femtocells |publisher= Tech Jungle |access-date= 2013-07-05 |archive-date= 2013-10-17 |archive-url= https://web.archive.org/web/20131017201223/http://www.techjungle.com/7528 |url-status= live }}</ref> Italy, Ireland,<ref>{{cite web |url=http://www.vodafone.ie/mobilephoneservices/suresignal/ |title=Vodafone Sure Signal - boosting your mobile phone signal |publisher=Vodafone.ie |access-date=2012-07-26 |archive-url=https://web.archive.org/web/20120727034336/http://www.vodafone.ie/mobilephoneservices/suresignal/ |archive-date=2012-07-27 |url-status=dead }}</ref> Hungary<ref>{{cite web |url=http://www.telecompaper.com/news/vodafone-hungary-adds-3ghsdpa-femtocell-to-portfolio |title=Vodafone Hungary adds 3G/HSDPA femtocell to portfolio |publisher=Telecompaper |date=2011-05-09 |access-date=2012-07-26 |archive-date=2012-05-04 |archive-url=https://web.archive.org/web/20120504080554/http://www.telecompaper.com/news/vodafone-hungary-adds-3ghsdpa-femtocell-to-portfolio |url-status=live }}</ref> and The Netherlands.<ref>{{cite web |url=http://www.vodafone.nl/zakelijk/mobiel/netwerk_en_dekking/SignaalPlus/ |title=SignaalPlus - Overal in uw bedrijf perfect bereik |publisher=Vodafone.nl |date=2012-08-20 |access-date=2012-09-05 |archive-date=2012-09-09 |archive-url=https://web.archive.org/web/20120909014315/http://www.vodafone.nl/zakelijk/mobiel/netwerk_en_dekking/SignaalPlus/ |url-status=live }}</ref> Other operators in Europe have followed since then.

{| class="wikitable sortable"
|- style="background:#ccc; text-align:center;"
! '''Operator'''
! '''Country'''
! '''Launch date'''
! '''Note'''
|-
| [[Nsight|Cellcom]]
| {{flag|United States of America}}
| {{dts|March 2007}}
|-
| [[Sprint Corporation|Sprint]]
| {{flag|United States of America}}
| {{dts|September 2007}}
| provided by Samsung,<ref name=Sprint/> Airvana (now CommScope) <ref name=hub>{{cite web |url=https://www.lightreading.com/airvana-wins-major-sprint-femto-deal/d/d-id/669066 |title=Airvana Wins Major Sprint Femto Deal |publisher=[[Light Reading]] |access-date=2017-03-25 |archive-date=2017-03-25 |archive-url=https://web.archive.org/web/20170325202749/http://www.lightreading.com/airvana-wins-major-sprint-femto-deal/d/d-id/669066 |url-status=live }}</ref> 
|-
| [[StarHub]]
| {{flag|Singapore}}
| {{dts|November 2008}}
| provided by Huawei
|-
| [[SoftBank Mobile|SoftBank]]
| {{flag|Japan}}
| {{dts|January 2009}}
| provided by Ubiquisys
|-
| [[Verizon Wireless]]
| {{flag|United States of America}}
| {{dts|January 2009}}
|<ref name=SCF>{{cite web |url=http://www.smallcellforum.org/aboutsmallcells-small-cells-consumer-faqs |title=Where can I get a femtocell? |publisher=Small Cell Forum |access-date=2014-03-02 |archive-date=2014-03-02 |archive-url=https://web.archive.org/web/20140302222156/http://www.smallcellforum.org/aboutsmallcells-small-cells-consumer-faqs |url-status=dead }}</ref>
|-
| [[TDC A/S|TDC]]
| {{flag|Denmark}}
| {{dts|April 2009}}
| provided by Ubiquisys<ref>{{cite web |url=http://www.telecoms.com/2283/denmarks-tdc-strikes-femto-deal/ |title=Denmark's TDC strikes femto deal |publisher=telecoms.com |access-date=2014-03-02 |archive-date=2013-07-02 |archive-url=https://web.archive.org/web/20130702211731/http://www.telecoms.com/2283/denmarks-tdc-strikes-femto-deal/ |url-status=live }}</ref> 
|-
| [[Vodafone UK|Vodafone]]
| {{flag|United Kingdom}}
| {{dts|July 2009}}
| 
|-
| [[AT&T Mobility|AT&T]]
| {{flag|United States of America}}
| {{dts|September 2009}}
|<ref name=SCF/>
|-
| [[China Unicom]]
| {{flag|China}}
| {{dts|November 2009}}
|<ref name=SCF/>
|-
| [[NTT DoCoMo]]
| {{flag|Japan}}
| {{dts|November 2009}}
|
|-
| [[SFR]]
| {{flag|France}}
| {{dts|November 2009}}
| provided by Ubiquisys<ref>{{cite web |url=http://www.thinksmallcell.com/Femtocell-Operator/some-thoughts-on-sfr-femtocell-launch.html |title=SFR Femtocell Launch |publisher=Thinksmallcell.com |date=2009-12-01 |access-date=2016-05-13 |archive-url=https://web.archive.org/web/20160609223053/http://www.thinksmallcell.com/Femtocell-Operator/some-thoughts-on-sfr-femtocell-launch.html |archive-date=2016-06-09 |url-status=dead }}</ref> Retired at the beginning of 2019<ref>{{Cite web |title=Mobile : SFR arrête son service Femto, place aux appels Wi-Fi |url=https://blog.ariase.com/mobile/actualite/mobile-sfr-arrete-femto-appels-wi-fi |website=Arise |language=fr |access-date=2022-03-02 |archive-date=2022-03-02 |archive-url=https://web.archive.org/web/20220302155646/https://blog.ariase.com/mobile/actualite/mobile-sfr-arrete-femto-appels-wi-fi |url-status=live }}</ref>
|-
| [[NOS Comunicações|NOS]]
| {{flag|Portugal}}
| {{dts|December 2009}}
|<ref>{{cite web |url=http://www.thinkfemtocell.com:80/Operators/optimus-portugal.html |title=Optimus launches Femtocell service |access-date= 2010-12-21 |publisher= ThinkFemtocell|archive-url=https://web.archive.org/web/20110314161831/http://www.thinkfemtocell.com:80/Operators/optimus-portugal.html |archive-date=2011-03-14 }}</ref>
|-
| [[SingTel]]
| {{flag|Singapore}}
| {{dts|January 2010}}
|<ref>{{cite web |url=http://www.thinksmallcell.com/Operators/singtel.html |title=SingTel |publisher=ThinkSmallCell |date=2011-04-01 |access-date=2014-03-02 |archive-url=https://web.archive.org/web/20140302215446/http://www.thinksmallcell.com/Operators/singtel.html |archive-date=2014-03-02 |url-status=dead }}</ref>
|-
| [[Vodafone Spain|Vodafone]]
| {{flag|Spain}}
| {{dts|June 2010}}
|
|-
| [[KDDI]]
| {{flag|Japan}}
| {{dts|July 2010}}
|<ref name=SCF/>
|-
| [[Vodafone Greece|Vodafone]]
| {{flag|Greece}}
| {{dts|July 2010}}
|
|-
| [[Movistar]]
| {{flag|Spain}}
| {{dts|August 2010}}
|<ref name=SCF/>
|-
| [[T-Mobile UK|T-Mobile]]
| {{flag|United Kingdom}}
| {{dts|October 2010}}
|<ref name=SCF/>
|-
| [[Moldtelecom]]
| {{flag|Moldova}}
| {{dts|November 2010}}
|<ref name=SCF/>
|-
| [[Vodafone New Zealand|Vodafone]]
| {{flag| New Zealand}}
| {{dts|January 2011}}
| 
|-
| [[Vodafone Ireland|Vodafone]]
| {{flag|Ireland}}
| {{dts|February 2011}}
| 
|-
| [[Network Norway]]
| {{flag|Norway}}
| {{dts|February 2011}}
| provided by [[NEC]]<ref>{{cite web |url=http://www.telecompaper.com/news/network-norway-launches-femtocell-service-with-nec--785466 |title=Network Norway launches femtocell service with NEC |publisher=Telecompaper |date=2011-02-14 |access-date=2014-08-08 |archive-date=2015-09-24 |archive-url=https://web.archive.org/web/20150924130831/http://www.telecompaper.com/news/network-norway-launches-femtocell-service-with-nec--785466 |url-status=live }}</ref>
|-
| [[Optus]]
| {{flag|Australia}}
| {{dts|April 2011}}
|<ref name=SCF/>
|-
| [[Vodafone Australia|Vodafone]]
| {{flag|Australia}}
| {{dts|May 2011}}
|<ref name=SCF/>
|-
| [[MegaFon]]
| {{flag|Russia}}
| {{dts|May 2011}}
|<ref name=SCF/>
|-
| [[Vodafone Italy|Vodafone]]
| {{flag|Italy}}
| {{dts|May 2011}}
|
|-
| [[Vodafone Hungary|Vodafone]]
| {{flag|Hungary}}
| {{dts|May 2011}}
|
|-
| [[Orange (telecommunications)|Orange]]
| {{flag|France}}
| {{dts|May 2011}}
|Retired in September 2021<ref>{{Cite web |title=Fin de service de la Femtocell Orange |url=https://assistance.orange.fr/mobile-tablette/tous-les-mobiles-et-tablettes/depanner/fin-de-service-de-la-femtocell-orange_335759-870018 |website=Orange France |language=fr |access-date=2022-03-02 |archive-date=2022-03-02 |archive-url=https://web.archive.org/web/20220302155650/https://assistance.orange.fr/mobile-tablette/tous-les-mobiles-et-tablettes/depanner/fin-de-service-de-la-femtocell-orange_335759-870018 |url-status=live }}</ref><ref name=SCF/>
|-
| [[Orange (telecommunications)|Orange]]
| {{flag|Romania}}
| {{dts|May 2011}}
|<ref name=SCF/>
|-
| [[MTS (network provider)|MTS]]
| {{flag|Russia}}
| {{dts|May 2011}}
|<ref name=SCF/>
|-
| [[Vodafone Czech Republic|Vodafone]]
| {{flag|Czech Republic}}
| {{dts|July 2011}}
|<ref name=SCF/>
|-
| [[Beeline (telecommunications)|Beeline]]
| {{flag|Russia}}
| {{dts|August 2011}}
|<ref name=SCF/>
|-
| [[Vodafone Netherlands|Vodafone]]
| {{flag|The Netherlands}}
| {{dts|October 2011}}
| 
|-
| [[Cosmote]]
| {{flag|Greece}}
| {{dts|October 2011}}
|<ref name=SCF/>
|-
| [[Vodafone Portugal|Vodafone]]
| {{flag|Portugal}}
| {{dts|January 2012}}
|<ref name=SCF/>
|-
| [[Mosaic Telecom]]
| {{flag|United States of America}}
| {{dts|February 2012}}
|<ref name=SCF/>
|-
| [[Free Mobile|Free]]
| {{flag|France}}
| {{dts|February 2012}}
|In progress of retirement as from September 2021<ref>{{Cite web |title=Free met fin progressivement à la Femtocell |url=https://www.universfreebox.com/article/500341/free-met-fin-progressivement-a-la-femtocell |website=Univers Freebox |language=fr |access-date=2022-03-02 |archive-date=2022-03-02 |archive-url=https://web.archive.org/web/20220302155647/https://www.universfreebox.com/article/500341/free-met-fin-progressivement-a-la-femtocell |url-status=live }}</ref><ref name=SCF/>
|-
| [[Hutchison 3G|3]]
| {{flag|United Kingdom}}
| {{dts|February 2012}}
|<ref name=SCF/>
|-
| [[Zain Group|Zain]]
| {{flag|Bahrain}}
| {{dts|May 2012}}
|<ref name=SCF/>
|-
| [[Vodafone Germany|Vodafone]]
| {{flag|Germany}}
| {{dts|August 2012}}
| provided by Huawei<ref>{{cite web |url=http://www.teltarif.de/femtozelle-vodafone-privatkunden/news/47983.html |title=Vodafone: Femtozellen möglicherweise für "Alle" |publisher=teltarif.de |author=Henning Gajek |date=2012-08-29 |access-date=2014-03-02 |archive-date=2014-03-02 |archive-url=https://web.archive.org/web/20140302215306/http://www.teltarif.de/femtozelle-vodafone-privatkunden/news/47983.html |url-status=live }}</ref>
|-
|[[Globe Telecom|Globe]]
|{{flag|Philippines}}
|{{dts|December 2012}}
|provided by NEC, Nextivity & ip.access
|-
| [[Telefónica Germany|O<sub>2</sub>]]
| {{flag|Germany}}
| {{dts|May 2013}}
| provided by [[Alcatel-Lucent]]<ref>{{cite web |url=http://www.telefonica.de/news/0/msg/18223/5090/0/signal-box-von-o2-fuer-geschaeftskunden-optimaler-empfang-unabhaengig-von-baulichen-gegebenheiten.html |title=Signal Box von O2 für Geschäftskunden: Optimaler Empfang unabhängig von baulichen Gegebenheiten |language=de |publisher=Telefónica |date=2014-05-29 |access-date=2014-03-02 |archive-date=2014-03-02 |archive-url=https://web.archive.org/web/20140302231154/http://www.telefonica.de/news/0/msg/18223/5090/0/signal-box-von-o2-fuer-geschaeftskunden-optimaler-empfang-unabhaengig-von-baulichen-gegebenheiten.html |url-status=dead }}</ref>
|-
| [[M1 Limited|M1]]
| {{flag|Singapore}}
| {{dts|May 2013}}
|  provided by [[Alcatel-Lucent]]<ref>{{cite web|url=https://www.m1.com.sg/AboutM1/NewsReleases/2013/M1%20deploys%20Small%20Cell%20solution.aspx|title=M1 deploys Small Cell solution|publisher=M1|date=2013-05-21|access-date=2015-03-16|archive-date=2015-04-27|archive-url=https://web.archive.org/web/20150427111338/https://www.m1.com.sg/AboutM1/NewsReleases/2013/M1%20deploys%20Small%20Cell%20solution.aspx|url-status=live}}</ref>
|-
| [[Orange Polska|Orange]]
| {{flag|Poland}}
| {{dts|January 2014}}
| 
|-
| [[Sunrise Communications AG|Sunrise]]
| {{flag|Switzerland}}
| {{dts|February 2014}}
| provided by NEC<ref>{{cite web |url=http://www1.sunrise.ch/is-bin/intershop.static/WFS/Sunrise-Site/Sunrise-Info/de_CH/%C3%9Cber%20Sunrise/Mediencenter/Medienmitteilungen/2014/DE/MM_20140224_Sunrise_indoor_box_DE.pdf |title=Sunrise lanciert indoor box für eine optimierte Abdeckung in Innenräumen |language=de |publisher=Sunrise |date=2014-02-24 |access-date=2014-03-02}}</ref>
|-
| [[Orange Switzerland|Salt]]
| {{flag|Switzerland}}
| {{dts|April 2014}}
| provided by Nokia<ref>{{cite web |url=http://www.itmagazine.ch/Artikel/54682/Mehr_4GLTE_und_besserer_Empfang_fuer_Orange-Kunden.html |title=Mehr 4G/LTE und besserer Empfang für Orange-Kunden |language=de |publisher=IT Magazine |date=2013-11-28 |access-date=2013-11-28 |archive-date=2013-11-30 |archive-url=https://web.archive.org/web/20131130055653/http://www.itmagazine.ch/Artikel/54682/Mehr_4GLTE_und_besserer_Empfang_fuer_Orange-Kunden.html |url-status=live }}</ref>
|-
| [[Maxis]]
| {{flag|Malaysia}}
| {{dts|April 2014}}
| provided by [[Alcatel-Lucent]].<ref>{{cite web|url=https://www.malaysianwireless.com/2012/04/maxis-femtocell-coming-soon|title=Maxis Femtocell coming soon|language=en|publisher=MalaysianWireless|date=2012-04-03|access-date=2012-04-03|archive-date=2012-04-06|archive-url=https://web.archive.org/web/20120406150652/http://www.malaysianwireless.com/2012/04/maxis-femtocell-coming-soon/|url-status=live}}</ref>
|-
| [[DiGi]]
| {{flag|Malaysia}}
| {{dts|January 2015}}
| Planned to launch Femtocell in 2014.<ref>{{cite web|url=http://www.soyacincau.com/2014/12/17/bad-reception-indoors-digi-offers-femtocell-for-business-users|title=Bad reception indoors? DiGi offers FemtoCell for Business Users|language=en|publisher=MalaysianWireless|date=2016-06-13|access-date=2016-06-13|archive-date=2016-01-07|archive-url=https://web.archive.org/web/20160107030058/http://www.soyacincau.com/2014/12/17/bad-reception-indoors-digi-offers-femtocell-for-business-users/|url-status=live}}</ref>
|-
| [[Advanced Info Service|AIS]]
| {{flag|Thailand}}
| {{dts|January 2015}}
| provided by [[Alcatel-Lucent]]
|-
| [[dtac]]
| {{flag|Thailand}}
| {{dts|January 2015}}
| provided by [[Alcatel-Lucent]]
|-
| [[Swisscom]]
| {{flag|Switzerland}}
| {{dts|June 2015}}
| provided by Cisco<ref>{{cite web |url=http://www.itmagazine.ch/Artikel/60017/Swisscom_will_Empfang_in_Bueros_verbessern.html |title=Swisscom will Empfang in Büros verbessern |language=de |publisher=ITMagazine |date=2015-06-18 |access-date=2015-06-18 |archive-date=2015-07-17 |archive-url=https://web.archive.org/web/20150717221803/http://www.itmagazine.ch/Artikel/60017/Swisscom_will_Empfang_in_Bueros_verbessern.html |url-status=live }}</ref>
|-
| [[w:ru:МТС (Белоруссия)|MTS]]
| {{flag|Belarus}}
| {{dts|June 2015}}
| provided by Cisco<ref>{{cite web |url=https://www.mts.by/news/94881/ |title=МТС и Cisco завершили в Беларуси тестирование фемтосот |language=ru |publisher=mts.by |date=2015-06-23 |access-date=2020-12-01 |archive-date=2020-09-25 |archive-url=https://web.archive.org/web/20200925043634/https://www.mts.by/news/94881/ |url-status=live }}</ref>
|-
| [[T-Mobile US|T-Mobile]]
| {{flag|United States of America}}
| {{dts|November 2015}}
| provided by [[Alcatel-Lucent]]
|-
| [[Celcom]]
| {{flag|Malaysia}}
| {{dts|June 2016}}
| Planned to launch Femtocell in 2016.<ref>{{cite web|url=https://www.thestar.com.my/news/nation/2016/06/13/celcom-4g-network-to-be-upgraded|title=Celcom 4G network to be upgraded, connectivity problems expected|language=en|work=The Star|date=2014-12-17|access-date=2014-12-17|archive-date=2016-06-16|archive-url=https://web.archive.org/web/20160616171510/http://www.thestar.com.my/news/nation/2016/06/13/celcom-4g-network-to-be-upgraded/|url-status=live}}</ref>
|-
| [[Jio]]
| {{flag|India}}
| {{dts|July 2016}}
|
|}

== Retirement ==
From 2019 onwards, all 3 French carriers still proposing Femtocell retired their offering, focusing instead on using the [[Mobile VoIP|Voice Over Wifi]] technology when a better 3G/4G covering is impractical to deploy.

== See also ==
* [[5G]]
* [[Cellular repeater]]
* [[T-Mobile 4G LTE CellSpot]]

== References ==
{{Reflist|30em}}Ref. 8 can be found at : https://www.etsi.org/deliver/etsi_ts/125400_125499/125467/08.02.00_60/ts_125467v080200p.pdf a new release exists : https://www.etsi.org/deliver/etsi_ts/125400_125499/125467/10.06.00_60/ts_125467v100600p.pdf<nowiki/>{{Telecommunications}}

[[Category:Mobile telecommunications]]
[[Category:Telecommunications infrastructure]]