Apparently I must be the only person in the world having this problem, because I have searched everywhere and cannot find an answer to my problem. I have posted on here before with no help. I'm hoping I can get some answers here. I'm using an at&t factory unlocked galaxy s3 on straight talk and ever since I upgraded my phone to 4.1 I cannot get mobile data. I know I haven't gone over my limit since I rarely use it. But without it I can't send or receive mms. I cannot find any apn settings that work for me. I have tried the default one from straight talk to ones "the ultimate apn" with no luck. This is so frustrating. If anyone can help me, PLEASE do not hesitate to. I need this fixed.
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Sent from my SAMSUNG-SGH-I747 using Android Central Forums