Passport? Good.

Vietnam

Phone and internet

A local number is cheap here, and it unlocks more than maps.

Diagram: a SIM in Vietnam is registered against your passport at the point of sale

Can I use my own phone, and where do I get a SIM?

Buy a prepaid SIM on arrival with your passport — it is cheap, the coverage is good, and a local number is what makes the ride-hailing apps work.

Vietnam Tourism — Plan your trip

Sort the practical stuff before you fly.

eSIMs, rail passes, and airport transfers — the things worth booking before you land.