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原帖由: iMedic ,

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Pretty sure -1 is a hardware error. Anyways, you're there now. I would put the phone into dfu, and restore the phone. Whatever hasn't been saved, is lost now. You can restore to a backup, either through the cloud, or iTunes

Plug your device into your computer with a USB cable.

Turn off the device.

Hold the Power button for 3 seconds.

Hold the Home and Power buttons for 10 seconds.

Release the Power button but keep holding the Home button

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