Lenovo mobile phone S820 system has been rebooting after the system upgrade and can t turn on

The reason why Lenovo mobile phone S820 has been repeatedly restarted after upgrading the system is: the system failure of the mobile phone itself.

Solution: 1. Restore the phone to factory settings;

2. If it cannot be solved after recovery, it will be directly sent for repair and after-sales processing.

The steps to do a factory reset are as follows:

1. Turn off the phone completely;

2. When the phone is turned off, press the power button first, and then immediately press the volume down button + volume up button at the same time and don't let go, it will enter recovery after a while, note: press the volume up and down keys in recovery mode to select, and press the power button and home button to indicate OK;

3. After entering the recovery mode, you can choose to restore factory settings, no matter whether the phone is a recovery that comes with the system or a third-party recovery, as long as there is [wipe data factory reset];

4. Select [Wipe Data Factory Reset], then press the boot button to confirm, and then select [yes - delete all data].

5. Then re-select [Reboot System Now], press the power button to confirm, and then start the phone.

Sorry for the inconvenience! It is recommended that you re-flash your device to try:

If you have strong hands-on ability and are willing to take the risk (failure to flash may lose the warranty), you can consider flashing the machine yourself. Lenovo Lewen Firmware Zone:

If you are not familiar with the flashing operation, it is recommended that you go to the local after-sales maintenance station to upgrade the flash. Service site inquiry:

Dear Lenovo users, Hello.

According to your description, it is recommended that you take your phone to Lenovo's mobile phone service center for testing and repair;

IDEA Forum.

Think Forum.

Lenovo Community.

Hello. We apologize for the inconvenience.

1.If there is an automatic shutdown phenomenon immediately after booting up, it is recommended that you remove the SIM card or SD card to turn on and observe, it can be improved after removal, it is recommended to replace the SIM card or SD card, if so, it is not excluded that the card slot is abnormal, it is recommended to send it to the Lenovo site for repair.

2.If it does not occur frequently and there is no fixed rule, it is recommended to use software such as Le'an Security and 360 Mobile Phone Security Guard to regularly adjust and improve the stability of the equipment system. During use, you can close unused background programs to ensure that there are enough running memory and other resources to support the current program running.

3.Please recall whether it appears under individual software or operations, if so, you can go to: Settings - Applications - All, click on the corresponding software to select clear data, or uninstall and reinstall the software or similar software;

4.If you have other batteries, it is recommended that you replace them, and it is not excluded that the battery is abnormal or too short;

5.If there is no significant improvement after the above operations, please back up the fuselage data for factory reset.

If the problem still cannot be effectively solved and affects your normal use, it is recommended that you take the time to go to the maintenance station for specific testing and treatment.

Officially authorized repair site inquiry.

You are welcome to contact us at any time or visit Lenovo Lewen (for consultation.