While the Motorola V195 has all four GSM bands, you need to get it unlocked to use it in Europe with local SIM cards, since T-Mobile To Go only has international roaming for Canada and Mexico.
I'm not convinced that's true. If you go to
Prepaid Plans and click on the last item under Other Services, you get the International Services page, where it says in a box at the right that you can "Make calls in 192 countries" and you can pull down a country menu to find out what minutes cost in those countries.
But you certainly can get much better rates with local SIMs than T-Mo's 99¢/min. I like
http://www.smobil.com, who offer .01€ between customers.