I was trying to upgrade from 4.1 to 5.0.1 via 06.15.00 baseband using Redsnow and got stuck at updating through iTunes. I enter the DFU mode correctly but iTunes simply won't recognize the iPhone at all, either in DFU mode or just regularly turned on. I updated iTunes so I'm trying to diagnose the problem from there. I also use DiskAid to back up stuff and yesterday out of nowhere DiskAid didn't recognize either of my two 3Gs phones, one of which is 4.1 and one 4.3.3 both 06.15.00. Any ideas on what I should try? Thanks!