I am selling my old iPhone 4, it was jailbroken i'm not sure with what software the one that changes the apple to the skull when you turn it on. Anyway, I tried to reset to factory settings on the phone to delete all my stuff, it turned itself off etc and now it just turns itself back on, normal apple appears, then the skull appears and then the turning symbol comes on for around 10 mins then turns itself back off and the whole cycle starts all over again. I then tried letting the battery run down in the hopes that once the battery died it would break the cycle, as soon as it has enough charge it starts it all over again... you cannot turn the phone off, it just turns itself back on again and carries on. I left it doing this for the entire day yesterday and it just carries on doing it. I tried doing the hard reset to get it to let me connect to itunes to do a backup but can't even do that as it constantly turns itself back on so you don't have the chance to turn it off and then plug it into itunes etc. Any ideas?