Hey guys, So I've been using my unlocked Iphone 4S 64GB for quite awhile now. (Yes it was jailbroken, by redsn0w) and I had no problems with it, until I fell asleep today, and woke up to no battery, so I plugged it into my wall, and then it said plug it into Itunes. THIS IS WHERE I RAGED. For the past 6 hours, I've been trying to fix it. I kept getting the error code 21, but before I was getting a different error, the error code 21 came after I used Tiny Umbrella. and I've tried EVERYTHING. I deleted the files in HOST files, restarted computer, then replaced my HOST file with a different HOST file, and yes I deleted those lines with the apple link and a long number or whatever. I've put my Iphone in DFU mode, I've tried turning off fire wall, I've tried redsn0w, and tiny umbrella, I tried reinstalling Itune, and turning off my computer, I've tried using a different Iphone cable and a different dock and a different computer, NOTHING IS WORKING.. Please someone help me, this is making my crazy.