Comments Off on
image

The most common reason for iTunes Error 21 is that your iTunes is trying to download the restore files (. ipsw) but is unfortunately being blocked from authentication. This may be due to a hardware error, or maybe there is a communication failure between your device and the servers.

Put your device into DFU Mode. Hold the power button down for 3 seconds.
Connect to iTunes. Plug your iPhone into your computer, and access iTunes.
Restore iTunes. Open the ‘Summary’ tab in iTunes, then click ‘Restore.’. After Restore, your device is going to Restart.

The most common reason for iTunes Error 21 is that your iTunes is trying to download the restore files (. ipsw) but is unfortunately being blocked from authentication. This may be due to a hardware error, or maybe there is a communication failure between your device and the servers.

Put your device into DFU Mode. Hold the power button down for 3 seconds.
Connect to iTunes. Plug your iPhone into your computer, and access iTunes.
Restore iTunes. Open the ‘Summary’ tab in iTunes, then click ‘Restore.’. After Restore, your device is going to Restart.

The most common reason for iTunes Error 21 is that your iTunes is trying to download the restore files (. ipsw) but is unfortunately being blocked from authentication. This may be due to a hardware error, or maybe there is a communication failure between your device and the servers.

Put your device into DFU Mode. Hold the power button down for 3 seconds.
Connect to iTunes. Plug your iPhone into your computer, and access iTunes.
Restore iTunes. Open the ‘Summary’ tab in iTunes, then click ‘Restore.’. After Restore, your device is going to Restart.

Replace the battery to fix iTunes restore error 21. Disconnect the battery from the iPhone and leave it for about 10 minutes. Now connect the new battery, turn on the device and then connect it to the computer.

However, when you then launch iTunes, you may receive an error message that says, “The iPhone may not have been restored. A strange error (1) has occurred. The iTunes (1) error occurs for many reasons, the previous version of iTunes, software firewall security is enabled on the netbook and unknown hardware can cause such iTunes error.

Error twenty one is an error that can easily appear when trying to repair or update any iOS model such as iPhone, iPad or iPod. This will show up and show up if you have an iOS device connected to iTunes. Therefore, you may encounter phone error 21 or Apple iTunes error 21 due to unknown error when the mobile cannot be restored due to this error 21.

If you have already installed i-tunes, the installer will ask you to restore the software. After the restore is complete, restart your computer and try launching iTunes. If iTunes fails to install or repair, you may need to uninstall and then reinstall any remaining components, including your previous iTunes installation.

not a human. Open iTunes and select Help at the top. Step 2. Click Check for Updates or Update iTunes with Windows. Step 1 Launch iTunes along with “iTunes”, click Pub in the menu. Step 2. Select “Check for Updates” to download and install the latest version of iTunes on Mac. This can be a good way to fix Apple iTunes error 21 due to download corruption.


This is another important aspect that must be taken into account in order for the error to be fixed. Updating iTunes is the best option, which can cause the error to appear much more frequently. The iPhone was definitely not recoverable. Error 21 can appear when iTunes encounters almost one of the following reasons.