I am now also a T-Mobile customer/user! I don't want to give up beloved Alltel, so I have both. I have a Moto RAZR V3T, which is proving to be a nice choice. It is feature filled! Does the call quality of GSM exceed CDMA? We have noticed the GSM phones have more clarity. I have some quesitons. When I perform a network search, it will provide T-Moble and ROAMING as network options, and it will allow me to use either. When I view them, the T-Mobile lists 310-260 and the roaming is like 310-390. In various areas, these numbers change. Is there a way to look up what tower or system the numbers correlate with? (much like a SID for CDMA). What are some benefits of GSM over CDMA? Thank You!