How to delete information on unlocked iphone 3G. if you want to sell your jailbroken iphone, you should delete your personal information on unlocked iphone. you can remove your personal information from iphone without having to relock/unlock the Iphone again.

When you sync iphone in iTunes click Restore and restore it to its original settings. Then go to Settings on your iPhone, Reset > Reset All Settings. it will delete all your personal information.

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