There has been some talk of this happening and now it has. The Sony Ericsson TM506 has hit T-Mobile and is available right now.
The T-Mobile Sony Ericsson TM506 should be available everywhere and is meant to be used on T-Mobile 3G network, that is if you are one of the lucky ones who happens to live in one of those 3G areas.
Beyond the Sony Ericsson TM506’s 3G radio it offers a 2 megapixel camera, GPS with TeleNav support, music player, Bluetooth, and Memory Stick Micro M2.
The word is the T-Mobile Sony Ericsson TM506 commands a price tag of $79.99 on a 2 year contract and $50.00 mail in rebate.
Source — BGR via Intomobile