> Jeff, I have unlocked Nokia 5610 > (http://www.nokiausa.com/find-products/phones/nokia-5610-xpressmusic), > which I'm keeping as backup unit. > > It was unlocked by T-Mobile, and I used it in Europe. It's quad-band, > so I should work anywhere. It should be pointed out that T-Mobile will unlock any of their phones on demand, just call them and ask for the unlock code. I've done this for the last three of my phones whenever i am about to travel overseas. To the best of my knowledge the other GSM carrier in the USA, ATT/Cingulair, will not.