How to fix error 20 when restoring iPhone with iTunes

The use of iTunes , no one knows. From copying data, recovering your device password, to backing up and recovering data ... However, there are many errors with this software that cause users a headache, one of which is is "error 20" - An error is said to be the most common and most common when users restore iPhone with iTunes .

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Restore iPhone is the way we usually perform when our device has an error or in some cases required to do. Currently you can use both iTunes and iTools to restore iPhone, however, it is reported that when performing this method with iTunes, error 20 will occur relatively much.

So, what is "error 20"?

"Error 20" is defined as a system message when the user is making a device connection to iTunes and attempting to perform the Restore iPhone operation .

Cause of error 20?

This error is determined to occur primarily when users downgrade iOS version and the reason is determined by several reasons as follows:

Hardware error:

• The contact part between the cable and the iPhone device is defective. May loosen at the connectors (of the machine or the cord), be damaged and interfere with the connection process.

Software error:

• It may be because your computer's operating system is installing iTunes.
• Due to the faulty version of iTunes on the computer.
• Or the firmware for iPhone you installed has a problem.

How to handle error 20 when using iTunes

Need to determine where the error lies? How? In order to choose the most appropriate, economical and effective way to avoid damage, other unfortunate errors may occur.

Handling hardware errors:

• Buy a different cable and make a connection to the computer instead of the old one, or check the charging port of the device to make sure the cable or machine is faulty.

Handling software errors:

• Due to the computer's operating system: Temporarily turn off computer protection programs such as firewalls, anti-virus software, etc.
• Due to the error of iTunes version: Uninstall entire old versions (can use more Revo Uninstall , Your Uninstaller , or Advanced Uninstaller Pro ... professional computer software uninstallers) then download and reinstall Latest version follow the link above.
• Check the firmware version for your iPhone has lost the file or have any errors? Or to be sure, download a new version whenever you decide to restore your phone.

In other cases, the following instructions may be followed:

Step 1: An error occurs while downgrading the iOS operating system, you can try to put your device into DFU mode. How to implement this mode has been mentioned by Download.com.vn, you can refer to:

• How to put iPhone 7 into DFU mode.
• Learn DFU mode? How to perform DFU on iPhone and iPad.

Step 2: If the iPhone screen is still black, but on the computer, iTunes reports that it has received the device or heard a successful connection in recovery mode, we have put the device into DFU state. success.

Step 3: Press, hold SHIFT and left-click on Restore in iTunes to start the Restore process.

Step 4: Wait for the process to be completed and the device will work normally again.

ATTENTION:

You should consider carefully before deciding to upgrade your operating system, because not all devices can be upgraded, supported by new versions. Therefore, if you try, not only the error process, but even when you want to downgrade back, you are also prone to this "error 20" or many other errors.

I wish you successful implementation!