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hello i have a s4 sgh-i337m that has a null imei. I was able to repair the imli successfully through the repair imei/sn tab. Unfortunately, the phone is not catching any data network. Im able to to place calls without any problems. I have attempted to repairs the nvm. I also tried flashing the efs, nvm, and security backup of another s4 but i still can't get it to work. any ideas? Thanks!!
