Originally Posted by princeville

I'm in Bangkok right now and had the same experience with my iPhone 6s. In the airport it connected to True and went back and forth between 5 bars and "no service."

I couldn't get a quick iMessage to my husband to say that we had landed to send and couldn't connect to uber to get a car so I bought a local SIM. It was cheap and I'm glad I have that option, but that's not the way this is supposed to work.

Originally Posted by tai4de2

I've been in Bangkok this past week and roaming has been a poor experience. Phone is an iPhone 7 Plus, and I have a high-speed data pass in effect. This same combo had a decent enough experience when I was here 6 months ago. Something has changed.

The phone hops around onto all three networks (AIS, DTAC, True). On True, I have no data or sometimes very slow (as to be unusable) data. AIS is marginally better. DTAC works best but sometimes even trying to force the phone onto DTAC with manual carrier selection results in "No service". Also no matter which network I am on, SMS does not work reliably either inbound or outbound.

Fortunately my phone is unlocked and I bought a local SIM card. I plan to ask TMO to refund at least part of my high speed data pass when I get back.