Mobile phone
You can buy a SIM card for about 31.12 HKD, which includes 1 GB of data plan. You can choose from 4 telecoms: 3 (Three), China Mobile, SmarTone or csl..
Mobile phones
Hong Kong uses GSM mobile networks GSM 900 and GSM 1800.
Roaming
If you don't want to buy SIM card in Hong Kong upon arrival, make sure to check the roaming charges with your telecom provider before your departure so there are no surprises when you return home.