Data Problems Ug

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http://forum.xda-developers.com – Hey guys. So I traded my iphone 5 for a galaxy note 2 today. My iphone 5 was att and I thought the guy's Note was too but it turned out to be T Mobile (its was already rooted too). I couldnt walk away and traded anyway. Got the phone unlocked from Cell Unlocker and I went by ATT to get a new sim since the iphone took nano sims and the Note took micro. Activated it over the phone etc. I began getting texts as soon as I reset it but no 4G/3G icon & no data.Changed APNs to the wap.cingular one & the PTA one neither worked even after several resets between each. I flashed a new rom too sti (HowTos)