Have a Verizon S3 which I rooted using the first method I saw come out on this forum. I have had no problems until now. I have not used any custom roms or made any other changes beyond root. I have been unable to get the update. I get a the message that update failed. Anyone else have this problem how did you fix it. If I want to try to go back to unrooted stock .... how do I do that? Where might I find the files?