Originally Posted by Trimix
I emailed Tmobile asking them a similar question about using UMA internationally. They haven't replied yet and they are usually quite prompt. But I would imagine you should be able to use the phone at the very least in S. Korea. UMA is just wifi dependent. I'm curious about email/text/IM also.
With an 8320, you are totally reliant on WiFi, so only data services and UMA calling will work. SMS will not.
The best solution in South Korea is to use an 8707 or Bold with T-Mobile USA service.