I have an iPhone 4 running 4.3.3 with modem firmware 01.59.00 that is Jailbroken and can be unlocked. It is about to go on ebay. I tried to use the built in "erase all contents" but it just sits there and doesn't do anything. I can't hook it up to iTunes and restore because that would change the software and firmware making it locked and thus less valuable on ebay. Any idea how I can erase the phone without updating the software? TIA