Not one telecoms operator has offered to adopt a new voluntary guideline that proposes a seven-day cooling-off period to allow consumers to cancel contracts.
The Office of the Telecommunications Authority, which issued the code last week, said it might consider a mandatory code if the number of complaints remained high.
Some critics have urged the watchdog to take a harder stance given the lukewarm response.
Telecommunications services are a frequent target of consumer grievances. The watchdog received 4,016 complaints last year, a slight drop from the 4,317 in 2008.
Most complaints, 1,752, were about mobile services, followed by broadband services (1,099).
Marion Lai Chan Chi-kuen, director general of the watchdog, admitted no operators had offered to adopt the new code so far, although 'some had given positive responses'.
'We will urge them to declare their views as soon as possible and hope they will choose to follow,' she said. 'A mandatory code will not be necessary if we can see a drop in the number of complaints.'