My old mans just got a new phone so has given his old iPhone to my mum, she's just plugged it into her PC where iTunes told her there was an update available so she said yes, turns out my old man had it "unlocked" by a local phone shop, looks like they jailbroke it to unlock it instead of just removing the carrier lock so the iTunes update has now bricked the phone with some 1015 error..
There a way to un jb the phone and then just get the carrier lock removed so it can be upgraded via the official route etc, thought it was legal these days to remove carrier locks etc, dad was on o2 whereas mum is on 3...