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Reply to "Risk of trading in phone?"
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[quote=Anonymous]I don't know about phones that use Android but iPhones are safe to trade in once you wipe them. iPhones are encrypted and the decryption key is saved on the phone itself. Without that key, no data can be retrieved. When you do a factory reset, it deletes that key. If you're worried about data recovery, you can factory reset your phone then set it up again without logging into your account (ie as a new iPhone for someone without any apple account stuff) and then do a second factory reset. At that point, the data would have been encrypted then encrypted again. Someone would have to somehow retrieve the second encryption key that was securely deleted then retrieve the second encryption key that was also securely deleted then use that key to decrypt the data. It's basically impossible.[/quote]
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