Hello I need serious help. I am a total newbie and messed up my phone. I have a SGH-I337 AT&T. I tried to install a cwm recovery but I must chosen the wrong one. Now my phone just says the error message "software not authorized by AT&T." I had kitkat 4.4.2 so I cant use kies to restore phone, and to make matters harder I use a macbook white not windows. Is there a mac solution to this problem? How do I get my phone working again? Thank you to those who help in advance.
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