iPod Touch4 duf mode firmware upgrade jailbreak backup

iPod touch4 enters DUF mode to restore the system's operation as follows:

Step 2: Connect your iPod touch4 to your computer with a data cable.

Step 3: Press and hold the power button on your iPod touch4 and slide to power off when the shutdown interface appears.

Step 4: Then please press and hold the power button to turn on, then the Apple logo will appear on the screen, do not release the power button.

Step 5: Then press and hold the home button on the home screen until the screen goes black.

Step 6: When the screen is black, please release the power button and do not release the home button on the home screen until iTunes on the computer detects an iPod in recovery mode

Step 7: Press and hold the "Shift" key on your keyboard, click "Recover", and select the corresponding firmware to restore the system.

1. First of all, it is not recommended to upgrade, many of the TX that have been upgraded now want to go back. 2. The firmware is upgraded, and it definitely needs to be re-jailbroken 3. Remember to back up shsh (use this software tinyumbrella) before upgrading to prevent regret in the future! Finally, the firmware ready for ** enters DFU mode (A

Connect your device to your computer and turn it offPress and hold the power on button and the home button at the same timeWhen you see the white Apple logo, release the power on and off button and keep holding the home button D

Back up the data with iTunes before upgrading, if it's all up and down your own computer, please ignore, if not, please refer to: Open iTunes Point Advanced in the top row, right-click to authorize this computer Add your registration number, fill in the authorization of this computer, OK after the setup All iTunes are synchronized, synchronized after setting, and automatically backed up after synchronization, the original things are also in your current iTunes, After the upgrade jailbreak, connect the device and restore from the backup.

If you want to install an older firmware, you only need to have a backup of the old firmware version! If you haven't backed it up, you can only use the latest firmware!

If you have a backup of the old shsh, it is most convenient to set up your own authentication server under the latest version of tinyumbrella.

Check it out for yourself. A firmware upgrade is equivalent to reinstalling the system and must be re-jailbroken.

The backup can be directly used in iTunes, but I don't know if the pxl format software can back up.

Check it out on this website.

Backing up shsh with a small umbrella will do.

Now it can't be upgraded, and the Apple server in order to prevent users from jailbreaking the specified firmware, generally close the verification of the old version when the new version comes out. shsh is verification. Do not flash through the server.