Mobile operator Sunday is planning to extend its range of services into the highly competitive market for fixed-line international calls and later into Internet service provision.
The company wanted to use its brand name to leverage into other sectors of telecommunications, managing director Craig Ehrlich said.
Since launching in September 1997, the company had signed up 'more than 200,000 customers', on its PCS network, he said.
Sunday has been one of the most visible of Hong Kong's operators using high-profile advertising on television and posters to build its name.
Mr Ehrlich said the company planned to start offering retail-focused international services from April 1.
It already provides overseas call service as an add-on to its regular mobile phone functions.