Palm Treo 600 (GSM)

In answer to your question, No T-Mobile is not going to carry the Treo 650. If you have one from a different carrier or buy an unlocked one from somewhere you can still have T-mobile service, but you will not be able to purchase one. Instead Palm One is in the making of a new Treo even better then the 650. Since it is still in the developing stage there is no relese date, but when it is relesed T-Mobile will carry that one. Hope this is helpful to you. Have a good one.