IF YOUR iPhone/iPod Touch HAS BEEN JAILBROKEN, DON’T TRY THIS!!! IT WILL CAUSE YOUR IPHONE TO GET STUCK ON THE APPLE LOGO.
When your iPhone/iPod Touch is jailbroken and you are trying to reset all content and settings, the iPhone/iPod will be stuck on the apple logo and stay like that until you RESTORE your iPhone/iPod!. If your iPhone is not SIM FREE, and you are using UltraSn0w in order to use the phone as unlocked, YOU MUST TO USE A CUSTOM IOS FILE IN ORDER TO PREVENT YOUR MODEM BASE BAND FROM UPDATING! Please give me a thumbs up!