Hi, I'm interested in replacing my current TMobile phone with the G1. However, I'll be needing to travel to Europe for a few months, and would like to unlock it and use a European sim card while there. Talking to the guy at TMobile, he said it won't work with a non-TMobile(US) sim card, as you won't be able to sign onto you google account. He checked with two Android experts for me. Now... I see stories of people using unlocked phones in Europe. So, something is screwy. The only thing I can think of is that once you use it in the US, it can't then go to Europe? Can anyone resolve this? I'd like a G1, but I need a phone to use in Europe. Any first-hand accounts of unlocking a phone you use normally with a US account, and using it in Europe with a local sim card there for a period of time, would be great!