I bought a second-hand Huawei p20, but it was brushed. How can I brush back Huawei's original system?

To restore the original mobile phone system, it can be solved by forcibly upgrading the eCoverage or membership service (or service).

Use eRecovery to restore, operating steps:

1. After the mobile phone is turned off and the USB is connected to the computer (or charger), press and hold the volume increase button+power button for about 15 seconds, and the mobile phone will automatically restart to enter the eRecovery mode of Huawei system.

2. Click "Download the latest version and restore" on the main interface of eRecovery.

3. Click "Download and Restore" in the download interface, and the system will start the WLAN system and scan the available hotspots.

4. Select an available WLAN hotspot and enter a password to start connecting to the hotspot.

5. The system will automatically obtain the installation package information and download it automatically, without other operations. This process will take some time, please be patient.

6. After the download is completed, the system will automatically upgrade and install. After the upgrade is successful, the countdown will automatically restart and enter the main system.

Please follow the following steps to apply for membership service upgrade:

Enter the application market first and upgrade the "Member Service" application in the mobile phone to the latest version.

2. Click "Upgrades and Early Adopters" on the "Services" page of the member service application.

Third, check the introduction of the new version and click "Apply".

Fourth, check the application results.

After successful application, the system will pop up a prompt box for successful application. In the case of a large number of applicants, network data transmission may be delayed. Please wait patiently according to the prompts in the pop-up box, and then go to Settings > System > to check the updates in System Update.

Note: the membership service is in version 9.0.0.300 and above (version number view method: service->; My-> about) is renamed as a service, and the registration and upgrade procedures of both are the same.

If the problem still exists after the upgrade, please bring the purchase invoice to the service outlets for consultation on maintenance matters.