Hi,
New to the forum and spent a while looking for the answer to my question with no real luck. I have a new unlocked T-Mobile HTC HD2 that I want to use with my AT&T SIM card. Making calls and text messages work fine, but know MMS or internet(wi-fi works fine). I have found a few sites with different settings to manually input to make the phone work, but I have been unsuccessful in getting the phone working. I am new to cell phone tweaking and have no real idea what I am doing. Step by step instruction for DUMMIES would be greatly appreciated. If I can not get this phone to work, I am going to have to buy an AT&T phone since I need the data options to work. Thanks.

Jay