Sorry if this is a duplicate post, I searched with terms and couldnt find anything related. I went into Apple yesterday and they did a diagnostics on my iphone and found that my OS is corrupt which has been causing performance and battery issues as well as cellular issues. Not sure if i believed them or not. The guy did a DFU upgrade or something. Put the phone into DFU mode and connected to a mac and restored it. Seemed to work fine until i restored from my backup on my computer (i forgot to backup my pics and stuff). So question, how do i do what he did? Do i need to download the ios6 software or do i just put connect my phone to itunes, put it into dfu mode and hit restore and setup as a new phone?