Just wanted to say thank you so much. I got two of the razr hd dev. ed. and switched to T Mobile from sprint. They have been working rather well around Dallas, Tx. I'm not familiar with the different network speeds but mine runs on E with a network strength of around 63 dBm. Even at this speed it's tremendously better than Sprint. Calls are good, data is good. Another quick note. I did not unlock my wife's phone and was still able to get it to work. So the warranty is still intact. Thanks again and keep up the great work.