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For months, many people have been asking me if there’s a way to run T-Mobile 3G/4G AWS bands on the AT&T Galaxy Note 2 SGH-i317. Well, I’ve always told them the AT&T Note 2 does not have the hardware required for T-Mobile’s HSPA+ bands but I feel really stupid now as it is possible with a bit of hacking. (Actually takes like 5 minutes, very easy to do and no root is required.)
So, yes, it IS possible to enable T-Mobile HSPA+ 42Mbps bands on your AT&T Galaxy Note 2, it’s running just fine on mine.
Step 1. You will need to put your AT&T Galaxy Note 2 SGH-i317 into a special modem mode so dial “*#7284#” on your phone.
Step 2. Choose “Qualcomm USB settings”.
Step 3. Choose “RNDIS + DM + MODEM” then connect a micro USB cable from your AT&T Note 2 to your computer.