Vietnam Cambodia 2-in-1 Travel SIM Card: 7-90 Day Unlimited Data with Various Plans

it worked was more expensive than local airport sim cards but knowing I already had it in my phone on arrival was reassuring.

Worked seamlessly in Vietnam & Cambodia. One SIM for both was perfect for our 2 week holiday.

Worked well, put in the SIM when we landed, and it worked perfectly. Fast internet and simple easy to use.