The telecommunication system in Hong Kong is one of efficient in the world. Local calls from public coin phones cost HK$1 for five minutes. Some phone boxes accept only cards (phonecards and credit cards) or only coins; others accept either. Phonecards can be bought in 7-Eleven Convenience stores and Circle K (OK) convenience stores.
Most mobile services in Hong Kong use the GSM standard. However, 3G is also supported in Hong Kong. Make sure your handset fits one of the networks. If you are not using a 3G or GSM networks, consult your home operator about how to connect to 3G or GSM roaming.
There are many ways to use mobile services in Hong Kong:
The postal service is reliable and postage is inexpensive. The main post offices are on Hong Kong Island, next to the Star Ferry Pier in Central, and at 10 Middle Road, Tsim Sha Tsui in Kowloon. Apart from post offices, stamps are also sold in 7-Eleven stores and Circle K (OK) convenience stores. Posting boxes are available in most MTR stations.