If you fly several times a year, your mobile plan should make travel painless rather than expensive. Two plan features matter most: the cost of a roaming day-pass, and eSIM support so you can add a destination data line without juggling plastic SIMs.
What to look for
- A low roaming day-pass in the regions you visit most.
- eSIM support, so you can run your HK line plus a travel eSIM.
- Enough home data that you are not constantly topping up.
- No long lock-in, so you can switch as travel patterns change.
Decide between a day-pass and a travel eSIM with our roaming guide, and check eSIM compatibility in our eSIM guide.
Find eSIM-ready plans →Frequently asked questions
Should travellers use roaming or buy a local SIM?
For short trips, a roaming day-pass or travel eSIM is easiest and keeps your number reachable. For long stays, a local SIM at your destination can be cheapest but gives you a local number instead of your HK one.
Will my Hong Kong plan work in mainland China?
Many HK plans include or sell a mainland China / Greater Bay Area data add-on, which avoids standard roaming charges and often works across the firewall via the HK operator. If you cross the border regularly, prioritise a plan with bundled GBA data — see our China & GBA data guide.
Do I need an eSIM-compatible phone to travel light?
It helps a lot. With an eSIM phone you keep your HK line active for calls and SMS while adding a destination data eSIM, with no SIM-swapping. Most phones from the last few years support eSIM — check our eSIM guide for the compatibility list.