Any modern phone will function properly only if all its systems work without interruption. This applies to both software and hardware devices. If the software has been flashed or updated improperly, then there is a high 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 is iPhones that most often bring inconvenience to their owners. It's not that Apple produces low-quality products. On the contrary, the phones of this manufacturer are considered one of the most durable and reliable devices. The problem is that users very often install applications on their smartphones that are not compatible with the iPhone system. Most often, the owners of "apple" products are faced with error 21. Let's take a closer look at what this may be due to. How to fix the situation?
Reasons
If error 21 appears on the phone, then this is not the most dangerous problem. However, it brings many inconveniences. Such a code may appear on the phone screen if:
- An error occurred while downloading updates. Especially often error 21 occurs whenupdating iTunes packages.
- Itunes registries have been corrupted, for example, if the owner of the phone manually updated the software.
- A virus "broke" into the software. Most often, this is due to an insecure operating system installed on the computer.
- There was a "conflict" of programs. For example, if the user installed a new utility that removed or blocked some files related to iTunes.
There are a lot of factors that can affect the operation of the system. In addition to error code 21, owners of modern smartphones often encounter other number combinations that appear on the device screen. However, most of these errors in one way or another are usually related to a failure in the software update process.
Creating a backup
Before you start any manipulations 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 a notebook. Enough to create a backup. Fortunately, the iPhone allows you to do this very quickly. In order to save files from a smartphone, you must:
- Connect phone to PC.
- As soon as the computer recognizes the device and notifies you, you must right-click on the icon.
- Select "Make a copy" in the context menu.
You can also save all your data using any of the cloud services. Luckily there are a lot of them now. After that, you can proceed to recovery. Error 21 should be gone.
Standard reset
This method is a universal way to get rid of the "glitches" of the smartphone. However, it should be borne in mind that when performing a factory reset, all user information (pictures, photos, videos and other files) will be completely deleted. That's why it's so important to create a backup first. It is also recommended to immediately download the latest versions of iTunes and iOS from the official website of the manufacturer.
After that, you need to perform the standard firmware as follows:
- Go to the iCloud section and turn off the iPhone search function. If the phone version is below 5, then this action is not needed.
- Connect your smartphone to PC and turn on iTunes. The program may start automatically.
- Next to the iTunes Store button there will be an icon with the image of the device. You need to press it and go to the settings.
- Click on the "Restore via iTunes" button and at the same time hold down the Shift key on the computer. If the recovery is carried out 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 fresh OS files.
After recovery, the device will enter Recovery Mode. The settings will be reset to factory settings. At the next stage, it will be possible to return the files from the backup to the phone. If error 21 appears again, then continue.
Recovery Mode
In this mode, you can also try to fix the error. Indeed, in this case, too,first save all the necessary documents and contacts from the phone book.
Next, do the following:
- Turn off the device.
- Press and hold the Home key.
- Without releasing the button, connect your smartphone to the PC.
- The media player icon will appear on the screen, and the system will inform you that the gadget has switched to Recovery Mode.
- If iTunes did not download automatically, you must force the program to start. A notification should appear on the screen stating that the device has been recognized by the media player.
- After that, the same actions are performed as when restoring to normal mode.
At the final step, you must specify the path of the new firmware and enter the Apple password.
Summing up
If iPhone error 21 persists, then the problems may be more serious than it might seem at first glance. In this case, you need to contact a specialized service center and diagnose the device.
