I'm sorry to read that you're having trouble while overseas! Are you travelling with your T-Mobile SIM? Was your roaming working, and stopped -- or have you not been able to pick up a roaming partner's network the whole time you've been abroad?
I found the problem. It something happening with mine phone.
Pleas close this thread.
All closed -- thanks for coming back to let us know you got it worked out! Glad you're doing okay.