So right before the release of evasi0n, I was going to do a full restore to a clean ios 6.1. After doing so, I got a "please insert a valid sim for you carrier" blah blah. Even after several DFU reinstalls. So I went to AT&T, had them swap some sims, but to no avail, so I went to Apple and they swapped the phones no problem. So on I went, but instead of doing a full restore, I just did an update software in itunes, and went ahead and did the evasi0n jb. In an effort to wipe the slate clean (for battery sakes) I attempted another restore but the phone bricked again due to the same sim error! On to apple again and another swap. I figured it must have been Carrier Editor, so I tried a restore again after an itunes re-install with the new phone and it bricked SIM again. I couldn't believe it. Luckily Apple swapped it again, and the Genius did an update in the store, but not a restore...which I was interested in seeing what would happen...but at that point i was just happy leaving with a working phone again Well long story short, does anyone have any idea what could be causing this? I don't want to be stuck in a situation where I cant restore the phone in fear of bricking the thing again. Could the ios 6.1 download be corrupted?