Why can't Lenovo phones set the lock screen?

It cannot be set. It may be that the card machine or mobile phone is set incorrectly, which can be solved by the following methods.

Enter phone settings-advanced settings

The screen lock cannot be switched to "None". It is recommended to restart the device and try again.

If the restart is still the same, you can back up the important information of the fuselage, avoid the risk of data loss, and restore the factory settings adjustment.

If the above operations are ineffective, it is recommended to contact the official after-sales site for specific detection and treatment.

When there is a problem with the mobile phone

If your device is enabled with USB debugging options, please connect PC synchronization software (Music Assistant, pea pods, etc.). ) Back up the important information of the fuselage with the data cable. If this option is not checked before, the fuselage data will be lost during the process of clearing data or reinstalling the system. 2. Your model supports double clearing operation in recovery mode. This operation will erase all data (contacts, call information, etc.). ) is stored in your device body. You can choose to do this operation yourself.

If your model supports entering recovery mode for double clearing operation, this operation will clear all data (contacts, call information, etc. ) stored in your device body, you can choose to do this operation yourself.

It is recommended to go to the local mobile phone repair point for maintenance service.