Hong Kong can be an expensive city to travel so knowing some budget tips would help you plan ahead. Here are some information that I hope could help you to get around.
1. Airport to the city. The cheapest means to reach the city center is via bus. From HK Airport Terminal 2 to City Center, take A21 flyer bus (approximately 40-50 mins) for 33HKD or 4USD. It’s easy to find the bus station, just follow the signs inside the airport. Buy the ticket on the left side of the bus station entrance. Do not board the bus unless you have the bus ticket. They will only accept cash in fixed amount and will not give you any change. They will let you go off the bus if you insist in asking for the change. The bus routes are flashed on the top and on the sides near the handle bars.
2. Free wifi. HK airport has complimentary wifi so does the buses. (A21 bus has free wifi).