View source for CSL Mobile

{{short description|Hong Kong telecommunication company}}
{{Use dmy dates|date=October 2019}}
{{Use Hong Kong English|date=October 2019}}
{{prose|date=February 2023}}
{{Infobox company
| name                = CSL Mobile Limited<br>香港移動通訊有限公司
| logo                = CSLHK logo.svg
| logo_size           = 150px
| type                = Subsidiary
| genre               = 
| foundation          = 1980 (first incorporation)<br/>2014 (the merger with PCCW Mobile)
| founder             = 
| location_country    = [[Hong Kong]]
| location            = 
| origins             = 
| area_served         = [[Hong Kong]]
| industry            = [[Mobile communication]]
| products            = 
| brands              = {{ubl|csl|1O1O|Club SIM}}
| services            = 
| revenue             = 
| operating_income    = 
| net_income          = 
| num_employees       = 
| parent              = [[Hong Kong Telecom|HKT]]
| divisions           = 
| subsid              = 
| owner               = 
| company_slogan      = 
| homepage            = {{URL|hkcsl.com/en}}<br>{{URL|1010.com.hk}}<br>{{URL|clubsim.com.hk/en/}}
}}
[[File:CSL Store in V City 2016.jpg|thumb|csl store in [[Tuen Mun]].]]
[[File:1010 Store in Tsim Sha Tsui 2012.jpg|thumb|1O1O store in [[Tsim Sha Tsui]].]]
'''CSL Mobile Limited''' ({{zh|t=香港移動通訊有限公司|cy=Hēunggóng yìhduhng tūngseun yáuhhaahngūngsī}}) is a [[Hong Kong]] telecommunications company, which operates mobile network brands of "'''csl'''", "'''1O1O'''" and "'''Club SIM'''". CSL is a subsidiary of [[Hong Kong Telecom]] (HKT) and was [[Hong Kong]]'s first [[mobile communications]] operator established in 1983,<ref>{{Cite web|url=http://www.hkcsl.com/pdf/CSL_eng_2000_2006/PDF_eng_2003/20030616_CSL.pdf|title=CSL Celebrates its 20th Anniversary and Opens a New Head Office in Cyberport|date=16 June 2003|website=CSL Mobile|access-date=2 April 2020}}</ref> and also the first network to launch the world’s first dual band [[4G LTE]] network with [[DC-HSPA+]].

The brand CSL was under different legal person in its operating history, namely Communication Services Limited, which known as Hong Kong Telecom CSL Limited from 1990 to 1999,<ref name=CR/> and then Cable & Wireless HKT CSL Limited from 1999 to 2001,<ref name=CR/> and then Hong Kong CSL Limited from 2001<ref name=CR/> (it became a subsidiary of CSL Limited<ref>{{cite press release|url=http://www.hkexnews.hk/listedco/listconews/sehk/2013/1220/LTN20131220043.pdf|title=Joint Announcement|date=20 December 2013|access-date=28 February 2018|publisher=PCCW Limited and HKT Trust c/o HKT Limited|via=Hong Kong Exchanges and Clearing website|pages=13–14}}</ref>{{primary source inline|date=February 2018}} after the formation of CSL New World Mobility), CSL Limited (formerly known as [[New World PCS]])<ref name=CR/> and CSL Mobile Limited; The current [[legal person]] of the brand, CSL Mobile Limited, was formally known as [[PCCW Mobile|PCCW Mobile HK Limited]].<ref name=CR/> It was the result of the merger of the brands CSL and PCCW Mobile.

==History==

In the 1990s, CSL was a company of [[PCCW]] (formerly [[Hong Kong Telecom|HKT]]). In 2002, PCCW sold CSL.<ref name=wsj2005/> In 2005, PCCW re-entered the [[mobile network operator]] business by acquiring [[Sunday Communications|SUNDAY]]<ref>{{cite news|first1=Mark|last1=Lee|last2=Wong|first2=Ka-chun|title=PCCW returns to mobiles with $1.94b bid for Sunday|url=http://www.thestandard.com.hk/stdn/std/Front_Page/GF14Aa02.html|work=[[The Standard (Hong Kong)|The Standard]]|location=Hong Kong|publisher=Sing Tao News Corporation |date=14 June 2005|archive-url=https://web.archive.org/web/20060309053535/http://www.thestandard.com.hk/stdn/std/Front_Page/GF14Aa02.html|archive-date=9 March 2006|access-date=28 February 2018}}</ref><ref name=wsj2005>{{cite news|title=Telecom: Hong Kong Regulator Clears PCCW Purchase |date=6 July 2005|work=[[The Asian Wall Street Journal]]|location=Hong Kong|ISSN=0377-9920|via=Factiva|publisher=Dow Jones & Company}}</ref> and setting up a new brand "[[PCCW Mobile]]". In 2014, HKT (a member of PCCW Group) acquired CSL New World Mobility and its subsidiaries such as CSL Limited and [[New World Mobility]]. In 2014, the legal person of [[PCCW Mobile]] was renamed into CSL Mobile Limited.<ref name=CR>Data in Hong Kong Companies Registry</ref> However, it used the brand CSL instead.

'''CSL''' was an abbreviation for '''''C'''ommunication '''S'''ervices '''L'''imited''<ref>{{cite press release|title=Hong Kong CSL Selects OceanFax FoIP to Replace its Existing Fax Server and Integrate with Exchange and Backend System|url=http://www.oceanfax.com/new_deals_CSL.asp|website=Ocean Fax|access-date=30 April 2018}}</ref><ref>{{Cite web|url=https://tel_archives.ofca.gov.hk/en/telecom_fact/milestones/main.html|title=OFTA - Telecom Milestones|website=tel_archives.ofca.gov.hk|access-date=2019-10-14}}</ref> and their original branding of "'''''C'''reate a '''S'''imple '''L'''ife''".<ref>{{Cite press release|url=https://www.hkcsl.com/pdf/CSL_chi_2000_2006/PDF_chi_2001/20010215_CSL.pdf|title=CSL zin2 si6 cyun4 san1 kei5 jip6 jing4 zoeng6|script-title=zh:CSL 展示全新企業形象|date=15 February 2001|publisher=Hong Kong CSL Limited [香港流動通訊有限公司]|language=zh-hk|trans-title=CSL Unveils New Corporate Identity|access-date=30 April 2018}}</ref> The CSL brand, logo and corporate colour (green) were all updated in August 2011 <ref>{{cite press release|title=CSL unleashes its new vision and logo|url=http://www.hkcsl.com/en/pdf/2011/CSL_Rebranding_External_Eng.pdf|publisher=CSL Limited|date=24 August 2011|access-date=1 February 2012}}</ref> and again in recent year.

===Timeline===
* 1980: Communication Services Limited was incorporated.<ref name=CR/>
*1984: CSL, a wholly owned subsidiary of Hong Kong Telecom, launches Hong Kong's first public mobile radiotelephone service using NEC's Advance Mobile Telephone System.<ref name="Telecom Milestones">{{cite web|title=Telecom Milestones|url=http://www.ofta.gov.hk/en/telecom_fact/milestones/main.html|work=OFTA|publisher=Office of the Telecommunications Authority|url-status=dead|archive-url=https://web.archive.org/web/20090708134734/http://www.ofta.gov.hk/en/telecom_fact/milestones/main.html|archive-date=2009-07-08}}</ref>
*July 1993: CSL launches its GSM service.<ref name="Telecom Milestones"/>
*June 1997: CSL launches its GSM 1800 network.<ref name="Telecom Milestones"/>
*December 1997: CSL acquires Pacific Link Communications. The acquisition included the digital cellular phone services (D-Amps), PCS (GSM1800) and radio paging services.<ref name="Telecom Milestones"/>
*2000: [[PCCW Limited]] buys HKT, including subsidiary CSL (known as Hong Kong Telecom CSL Limited at that time), for an estimated US$38 billion from [[Cable & Wireless plc|Cable & Wireless]].<ref>{{cite web|title=PCCW Fast Facts|url=http://www.pccw.com/About+PCCW/Company+Profile/Fast+Facts?language=en_US|work=PCCW Fast Facts}}</ref>
*February 2001: PCCW sells 60% of CSL to Telstra for $3.05 billion, in a joint venture called "Regional Wireless Company" (RWC).<ref>{{cite web|title=Telstra and PCCW Launch Joint Ventures|url=http://reach.com/news/in_the_news_archive/20010207_Telstra_and_PCCW_Join_Forces_In_Pan.pdf|work=Telstra and PCCW Launch Joint Ventures|access-date=1 February 2012|archive-url=https://web.archive.org/web/20120224160127/http://reach.com/news/in_the_news_archive/20010207_Telstra_and_PCCW_Join_Forces_In_Pan.pdf|archive-date=24 February 2012|url-status=dead}}</ref><ref>{{cite web|title=Telstra, PCCW Finalize Alliance|url=http://www.internetnews.com/bus-news/article.php/582991|work=Telstra, PCCW Finalize Alliance|access-date=1 February 2012}}</ref>
*July 2002: Telstra purchases PCCW's 40% stake in RWC for A$1.1billion, giving Telstra 100% ownership of CSL.<ref>{{cite web|title=PCCW ditches mobile ambitions|url=http://news.bbc.co.uk/2/hi/business/2077458.stm|work=PCCW ditches mobile ambitions|publisher=BBC News|access-date=1 February 2012}}</ref>
*March 2006: CSL & [[New World PCS]] merge to become the CSL New World Mobility.<ref>{{cite web|title=FY2006 Annual Results Announcement|url=http://www.nwd.com.hk/html/download/Presentation/2006ar.pdf|work=FY2006 Annual Results Announcement|publisher=New World Development Company Limited|access-date=1 February 2012|archive-url=https://web.archive.org/web/20120224053638/http://www.nwd.com.hk/html/download/Presentation/2006ar.pdf|archive-date=24 February 2012|url-status=dead}}</ref> The enlarged group owned the brands CSL, 1010, One2Free and [[New World Mobility]], and was majority owned by [[Telstra]]; [[New World Mobile Holdings]] was a minor shareholder.
*January 2007: New World Mobile Holdings agrees to sell its quarter stake of CSL New World Mobility to its parent company [[New World Development]], for US$321 million.
*March 2009: CSL launches the international award winning Next G™ network. Next G™ is an all-IP HSPA+ commercial mobile broadband network capable of download speeds up to 21&nbsp;Mbit/s <ref>{{cite web|title=CSL's Next G, the Shining Star in Hong Kong|url=http://wwwen.zte.com.cn/endata/magazine/ztetechnologies/2009year/no11/articles/200912/t20091222_178913.html|work=CSL's Next G, the Shining Star in Hong Kong|publisher=ZTE Limited|access-date=1 February 2012}}</ref><ref>{{cite web|last=Murph|first=Darren|title=21Mbps Next G mobile broadband comes to Hong Kong's CSL Limited|url=https://www.engadget.com/2009/04/01/21mbps-next-g-mobile-broadband-comes-to-hong-kongs-csl-limited/|work=21Mbps Next G mobile broadband comes to Hong Kong's CSL Limited|publisher=Endgadget|access-date=1 February 2012}}</ref> and provides the widest coverage in Hong Kong (as at 1 Dec 2011).<ref>{{cite web|title=Corporate Profile|url=http://www.hkcsl.com/en/about_us/corporate_profile.jsp|work=Corporate Profile|publisher=CSL Hong Kong|access-date=1 February 2012|archive-url=https://web.archive.org/web/20120121192045/http://www.hkcsl.com/en/about_us/corporate_profile.jsp|archive-date=21 January 2012|url-status=dead}}</ref>
*November 2010: Launches the world's first LTE/DC-HSPA+ network in partnership with ZTE.<ref>{{cite web|title=CSL Launches World’s First Commercial Grade LTE/DC-HSPA+ Network|url=http://www.hkcsl.com/en/pdf/2010/CSL_Network_Launch_eng.pdf|work=CSL Launches World’s First Commercial Grade LTE/DC-HSPA+ Network|publisher=CSL Hong Kong|access-date=1 February 2012}}</ref><ref>{{cite web|title=CSL and ZTE Unveils its Latest UMTS and LTE Developments for its Award-winning Next G Network in Hong Kong|url=http://www.umts-forum.org/content/view/2990/227/|work=CSL and ZTE Unveils its Latest UMTS and LTE Developments for its Award-winning Next G Network in Hong Kong|publisher=UMTS Forum|access-date=1 February 2012}}</ref>
*June 2012: CSL and [[SK Telecom]], the largest mobile operator in Korea, launches the world’s first 4G LTE international roaming between their two markets – Hong Kong and Korea.<ref>{{cite web|title=CSL and SK Telecom launch world’s first 4G LTE international roaming|url=http://www.hkcsl.com/en/pdf/2012/SKT_CSL_LTE_roaming_launch_ENG.pdf|work=CSL and SK Telecom launch world’s first 4G LTE international roaming|publisher=CSL Hong Kong|access-date=6 July 2012}}</ref>
*December 2013: CSL launches the first VoLTE (Voice over LTE) network in Hong Kong.<ref>{{cite web|title=1O1O and one2free turn on VoLTE Network across Hong Kong|url=http://www.hkcsl.com/en/pdf/2013/1O1O_and_one2free_turn_on_VoLTE_Network_across_HK_Eng.pdf|work=1O1O and one2free turn on VoLTE Network across Hong Kong|publisher=CSL Limited|access-date=3 January 2014}}</ref>
*December 2013: Telstra and New World Development have agreed to sell CSL New World Mobility to HKT, a listed unit of PCCW for $2.43B USD, essentially selling it back to PCCW. Telstra owns 76.4% of CSL, New World Development owns the rest 23.6%.<ref>{{cite web|title=Telstra enters into agreement to sell CSL in Hong Kong|url=http://www.telstra.com.au/abouttelstra/download/document/tls894-csl-201213-2.pdf|work=Telstra enters into agreement to sell CSL in Hong Kong|publisher=Telstra Corporation Limited|access-date=3 January 2014}}</ref>
*May 2014: The Communications Authority agree to the sale of CSL, subject to conditions.<ref>{{cite web|title=Communications Authority Decides to Give Consent to the Proposed Acquisition of CSL New World Mobility Limited ("CSLNWM") by HKT Limited with Conditions Imposed|url=http://www.coms-auth.hk/en/media_focus/press_releases/index_id_699.html|work=Communications Authority Decides to Give Consent to the Proposed Acquisition of CSL New World Mobility Limited ("CSLNWM") by HKT Limited with Conditions Imposed|publisher=Communications Authority|access-date=5 May 2014}}</ref>
* September 2014: The brand [[New World Mobility]] was renamed to [[Sun Mobile]], and owned by HKT and {{ill|Telecom Digital|zh|電訊數碼}}
*December 2014: CSL launches the first [[LTE Advanced]] network in Hong Kong.<ref>{{cite web|title=csl. customers to be the first in Hong Kong to benefit from the faster LTE-Advanced mobile network technology|url=http://www.hkt.com/About%2BHKT/Press%2Binformation/Press%2BInformation%2BDetail?guid=45801e721616a410VgnVCM1000006a8ba8c0____&language=en_US|work=csl. customers to be the first in Hong Kong to benefit from the faster LTE-Advanced mobile network technology|publisher=HKT Limited|access-date=19 December 2014}}</ref>
*April 2020: Become one of the three operators in Hong Kong to launch 5G network.<ref>{{Cite web|url=https://www.telecompaper.com/news/hkt-to-launch-true-5g-service-hong-kong-on-1-april--1331216|title=HKT to launch 'True 5G' service Hong Kong on 1 April|date=1 April 2020|website=Telecompaper|access-date=2 April 2020}}</ref>

== Network ==
{| class="wikitable sortable"
|+Frequencies used on csl (HKT) in Hong Kong
|-
! Frequency !! Frequency Width !! Protocol !! Notes
|-
| 900&nbsp;MHz (895~905;940~950) || 2*10&nbsp;MHz ||[[GSM]]/[[LTE (telecommunication)|LTE]]|| 3G: 937.4;892.4
|-
| 1800&nbsp;MHz (1720~1740;1805~1825)|| 2*20&nbsp;MHz ||[[GSM]]/[[LTE (telecommunication)|LTE]]|| 
|-
| 2100&nbsp;MHz || 2*15&nbsp;MHz ||[[UMTS]]/[[LTE (telecommunication)|LTE]]|| 3G: 2132.6;1942.6 + 2137.4;1947.4
|-
| 2600&nbsp;MHz (2530~2550;2650~2670) || 2*20&nbsp;MHz ||[[LTE (telecommunication)|LTE]]|| swap spectrum with CMHK <ref>{{cite web|url=https://www.coms-auth.hk/filemanager/statement/en/upload/351/ca_statements20160114_en.pdf|title=Frequency Swap betweenChina Mobile Hong Kong Company Limited andHong Kong Telecommunications (HKT) Limitedin the 2600 MHz BandStatement of the Communications Authority|date=19 January 2016|publisher=Communications Authority|location=Hong Kong|access-date=20 October 2019}}</ref>
|-
| 2600&nbsp;MHz (2515~2520;2635~2640) || 2*5&nbsp;MHz ||[[LTE (telecommunication)|LTE]]|| via Genius Brand Limited (JV of HKT， three hk)
|-
| 3.3&nbsp;GHz (3330~3360) || 30&nbsp;MHz ||   || 
|-
| 3.5&nbsp;GHz (3460~3510) || 50&nbsp;MHz || [[5G NR]]  || 
|-
| 4.9&nbsp;GHz (4880-4920) || 40&nbsp;MHz ||   || 
|}

== See also ==
* [[Sun Mobile]], a mobile network operator that is also owned by HKT

== References ==
{{Reflist}}

==External links==
* {{official website|http://www.hkcsl.com}}
* [https://www.1010.com.hk Official website of CSL Mobile's 1010 brand]

{{PCCW|state=expanded}}
{{Hong Kong mobile phone companies|state=expanded}}
{{Bridge Alliance}}

[[Category:Mobile phone companies of Hong Kong]]
[[Category:Telecommunications companies established in 1980]]
[[Category:1980 establishments in Hong Kong]]
[[Category:New World Development]]
[[Category:Pacific Century Group]]
[[Category:Telstra]]