Error 21 on the iPhone: the reasons for the occurrence, how to fix it

Any modern phone will function normally only if all its systems work without interruptions. This applies to both the software and the hardware of the devices. If the software has been rebuilt or updated improperly, then there is a big risk of seeing an error on the smartphone screen. Therefore, installing third-party programs and utilities is highly discouraged when using phones such as the iPhone.

By the way, it's the iPhones that most often bring inconvenience to their owners. It's not that Apple produces low-quality products. On the contrary, phones of this manufacturer are considered to be one of the most durable and reliable devices. The problem is that users very often install applications on smartphones that are not compatible with the iPhone system. Most often, the owners of the "apple" products encounter an error of 21. Consider in more detail what this may be related to. How to fix the situation?

Causes

If the phone displays error 21, then this is not the most dangerous problem. Nevertheless, it brings a lot of inconvenience. Such code can appear on the phone screen if:

• An error occurred while downloading updates. Especially often error 21 occurs when iTunes packages are updated.
• There was a damage to the "Aityuns" registries, for example, if the owner of the phone updated the software in a manual mode.
• The software "broke through" the virus. Most often this is due to an unprotected operating system installed on the computer.
• There was a "conflict" of programs. For example, if a user has installed a new utility that has deleted or blocked some of the files associated with iTunes.

Factors that can affect the operation of the system are huge. In addition to error code 21, owners of modern smartphones often come across other numerical combinations that appear on the screen of the device. However, most of these errors are in one way or another usually associated with a failure in the software update process.

Backup Creation

Before you start any manipulation with the phone, you need to copy all the important information from it. Of course, for this you do not need to rewrite everything in the notebook. It is enough to create a backup. Fortunately, the iPhone allows you to do this very quickly. In order to save files from your smartphone, you must:

• Connect the phone to the PC.
• As soon as the computer recognizes the device and notifies about it, it is necessary to click on the icon with the right mouse button.
• Select the "Create Copy" option in the context menu.

Also, you can save all the data by using any of the cloud services. The benefit now is their huge number. After that you can proceed to recovery. Error 21 should disappear.

Standard Reset

This method is a universal way that will get rid of the "glitches" of the smartphone. However, it should be borne in mind that when performing a reset, all user information (pictures, photos, videos and other files) will be completely deleted. Therefore, it is so important to create a backup beforehand. It is also recommended that you immediately download the latest versions of iTunes and iOS from the official website of the manufacturer.

After that, you need to perform the firmware as follows:

• Go to the iCloud section and disable the iPhone search feature. If the phone version is below 5, then this action is not needed.
• Connect your smartphone to your PC and turn on iTunes. The program can start automatically.
• Next to the iTunes Store button there will be an icon with the image of the device. You need to click it and go to the settings.
• Click the "Restore via iTunes" button and at the same time hold down the Shift key on the computer. If the recovery is through the Mac, then hold down Alt.
• The following dialog box will appear on the screen, in which you must specify the path to the previously downloaded files of the new OS.

After the device is restored, it will go into Recovery Mode. The factory settings will be reset. At the next stage, you can return files to the phone from the backup. If error 21 reappears, then continue.

Recovery Mode

In this mode, you can also try to fix the error. However, in this case, too, must first save all the necessary documents and contacts from the phone book.

Then you need to do the following:

• Disable the device.
• Hold and hold the Home key.
• Without releasing the buttons, connect the smartphone to the PC.
• A media player icon will appear on the screen, and the system will inform you that the gadget has entered Recovery Mode.
• If the iTunes download does not happen in automatic mode, you must run the program forcibly. The screen should show a notification that the device was recognized by the media player.
• After that, the same actions are performed as in the restoration in the normal mode.

At the final stage, you must specify the path of the new firmware and enter the Apple password.

Summing up

If the error 21 on the iPhone does not disappear, then the problems can be more serious than it might seem at first glance. In this case, you need to contact a specialized service center and conduct the diagnostics of the device.