There have been public concerns about whether the Unsolicited Electronic Messages Ordinance (UEMO) is applicable if the commercial electronic messages are sent using non-conventional means such as mobile messaging applications. The answer is a definite "yes".
We wish to advise members of the public that all telemarketing calls sent in the form of pre-recorded telephone messages, including those sent using the "missed call" tactics, are classified as commercial electronic messages and are subject to the regulation under the Unsolicited Electronic Messages Ordinance.
If you wish to minimize the number of unsolicited commercial electronic messages received, the simplest way is to register your telephone/fax number onto the Do-Not-Call Registers. This article provides some tips on registration with the Do-Not-Call Registers.