Have a Note 2 AT&T I bought from a friend. Brought it to stock version 4.1.1 to unlock it to use with My Family Mobile. I tried to do an update from samsung kies and at the end of it the update failed and my phone threw a invalid magic string. had to go back to 4.1.1. Using Odin to flash. And if I can bring it to a newer update will my phone still be able to read my family mobile sim? Any solutions out there?