CSL is Hong Kong's first and leading mobile network operator. It is the only mobile company in the world to operate with a distinctive multi-brand strategy providing customer-centric services through the brands: 1O1O, one2free and New World Mobility and a number of pre-paid service brands
It operates a world-class GSM / WCDMA /UMTS 900 network in Hong Kong and launched the worldˇ¦s first 4G LTE/D-C* network in November 2010, through which it offers comprehensive mobile and broadband services to both local and international customers. CSL also supports customers across the world, as the leading roaming operator in Hong Kong providing unmatched global multi-media connectivity through over 580 mobile operator partners around the world.
CSL is a subsidiary of Telstra Corporation Limited, Australiaˇ¦s leading telecommunications and information services company.
* 4G LTE D-C refers to LTE/DC-HSPA+, it meets the standards of LTE laid down in 3GPP Release 8.