Originally Posted by
richardinmotion
I just returned from Vietnam and Cambodia and can confirm that there was no data in either country. However, cheap sim cards in both countries were easily had in the arrivals hall. 3 minutes max and I was on my way with 3G data. In Cambodia, the guy wiped out my APN settings to get the data to work, which caused me some issues when arriving back in the USA.
I have a Moto G for when I need to get a local Sim. I've experienced what you went through, never again.