I have a T-mobile Dash which I have upgraded and flashed the original htc rom on it and updated it to windows 6, I was thinking about switching over service to it, but I want to know if It has 3g speeds now. I know the new tmobile dash htc s621 is 3g but I figured since my old dash is running about 400% faster after putting the original htc rom on it and updating windows I might not need to buy a new one?