Hi, I am new member to this forum. I had been using this cricket galaxy s3 (sch r530c 4g lte cdma) last couple of weeks.I got this phone from one of my friends living in U.S. I had been able to use it in my country without any problem so far. Phone was running on ics smoothly. But once I upgraded to jb (through automatic upgrade) it got locked again.I guess my friend unlocked it for me from U.S. I can't find any appropriate solution in my country. I tried to unlock it by downgrading my id to ics again but result is negative. Can anyone please help me out??? How can i permanently unlock it?