I bought the phone being that it was Tri-band and thought it will be useful to me. well, it turns out that one of the locations I am being sent to doesn't have T-mobile connection. I am moving to South Carolina and T-mobile has no connection there. I spent money on a phone and now I can't even use it. I Feel that T-mobile should give you some kind of map that indicates the places your phone is able to work. everything works great though.I would still like a map of places T-mobile's connected to. so, before you purchase the phone first ask if the area you plan on using it in has T-mobile service.