Seen this in a post earlier this week to unlock a gs3....so I tried it and it worked on mine... Dial *#197328460# then you get a menu.. Select the (1) utms > (1) debug screen > (8) phone control >(6) network lock > options (3) persosha256 off > then wait at least 30 seconds.... Then go back by pressing the menu button then select back and now you are in... Then select network lock again then choose (4) network lock initialize and wait at least one minute then reboot the phone.. I hope this helps u and others...
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