Originally Posted by dc/dc
As John mentioned, your coverage will be the same, but your roaming charges will be significantly lower with T-Mobile.
I got my 8700 last fall for a vacation in Europe. UK down thru Germany to Italy back up thru Switzerland to France. I am on an AT&T plan, and international unlimited data plan..
I had great service everywhere except for a half hour section north of Milan near the Swiss border. My voice calls were $.99/minute, but data was pre-paid for the $20/month additional on the Blackberry Unlimited International plan from AT&T. I selected AT&T for this plan which T-Mobile didn't carry at that time (haven't checked on it since Sept last year)