Backup Shsh method
1. First install a love thinking Assistant in the computer, then connect the mobile phone to the computer, open the Love thinking Assistant, click "Advanced Player" as shown in the following figure.
2. Now we can back up on the phone.
3. Of course we can also back up from the Apple official online.
4. To enter the DFU mode when backing up.
Mobile phone into DFU mode
Method
1, connect the iphone with the USB cable to the computer, and then you will hear the computer has been connected to the success of the sound of the prompts.
2. Now please turn off the iphone first, then you will hear the computer is not connected to the successful sound of the message.
3, please hold down the switch machine key and the home key, continue to the first 10 seconds, please immediately release the key, and continue to hold down the home key.
4, this time itunes will automatically start, and prompts you to restore Mode (the iphone will always keep the black screen state), then you can hold down the keyboard shift button, click "Restore", select the appropriate firmware to restore.