The iPhone's "Error 9" is a failure to recover, usually caused by a faulty installation of one of the programs on the phone. While this error is fairly common, the exact cause remains "unknown." Fortunately, there is a fairly standard solution for most cases and a solid backup if nothing else works. Fixing the error uses a backup version of the phone's programming, created any time the phone is synced with iTunes, restored or iTunes is updated.
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Things you need
- USB cable
Download the latest version of iTunes.
Turn the iPhone off by holding down the "Sleep/Wake button" until the phone is completely shut down. Do not have the phone hooked up to the computer.
Hold the "Home" button down and connect the iPhone to the computer. Keep the button pressed until iTunes shows that the phone is in recovery mode. Release the button.
Follow instructions as they appear on the screen. The procedure will use a previously created backup and should restore the phone.
Tips and warnings
- If the problem continues, try using a different USB port to connect the phone to the computer. If this doesn't work, take the iPhone to the nearest Apple Store and see what can be done. Worst-case scenario: you may be provided with a new iPhone.
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