If the phone appears to have a blue screen, black screen, white screen, crash, or freeze during use, it is recommended to press and hold the power button for more than 10 seconds to force restart the phone, and follow the following methods to troubleshoot:

1. Confirm whether any abnormality occurs when using the mobile phone while charging

This situation will cause the mobile phone to overheat and cause abnormality. It is recommended to avoid playing with your phone while charging.

2. Confirm whether there are exceptions when multiple applications are running at the same time

Multiple applications running in the background will occupy too much memory or other resources, and the phone may be overloaded. An exception occurred. It is recommended to avoid running multiple applications at the same time.

3. Confirm whether any exception occurs when playing large-scale games or running certain specific applications

Some third-party applications are incompatible with the system and may cause the phone to freeze and the system to freeze. As a result, a black screen or reboot occurs. It is recommended to enter application management to find and uninstall incompatible software, clean up the memory, and upgrade third-party applications and system software to the latest versions to see if this can be resolved.

4. Confirm whether a non-Huawei official system has been installed.

Unofficial systems will affect the stability of the phone and cause the phone to appear abnormal. It is recommended to bring the purchase certificate to the Huawei Customer Service Center Restore or upgrade the system.

5. After confirming whether a certain software is installed or clicking an unknown link, the phone appears abnormal

You can enter safe mode and uninstall previously installed software.

Enter and exit safe mode:

EMUI 9.1 and below: Press and hold the volume down button at the same time during the boot process to complete the boot. When the words safe mode appear in the lower left corner of the screen, it means that the phone has entered ;

EMUI 9.1 and above: During the boot process, press and hold the power button and the volume up button at the same time until Recovery mode appears, select safe mode;

Mate30 Pro amp; Mate30 RS: After the phone starts vibrating, press the power button 5 times to enter;

Restart the phone to exit safe mode.

6. Confirm whether the system files have been accidentally deleted, causing the phone to malfunction

When the system is running, the corresponding files cannot be found, causing confusion and causing the phone to malfunction. Try to restore the phone system version through Huawei Mobile Assistant or eRecovery.

If the phone can display the HD icon normally before the system is repaired, but cannot display it after the repair, it is recommended to unplug the SIM card and replace it with a SIM card from another operator. After it is registered to the network normally, replace the SIM card. Remove the card and insert the SIM card in question into the phone.

7. After confirming whether the microSD card is installed, the phone appears abnormal

It is recommended to re-insert the microSD card and check whether the problem still exists. If the problem does not exist, it may be a poor contact. If the problem still exists, the microSD itself may be damaged or incompatible with the phone system. It is recommended to replace it with a high-quality microSD card.

8. Still can’t solve it?

If the problem still exists, it is recommended to back up the data (QQ and WeChat need to be backed up separately) and then bring the purchase voucher to the Huawei Customer Service Center for detection and processing.