Huawei's mobile phone clicks, what is the black screen of my letter?

Hello, this may be caused by the incompatibility between some third-party applications in the mobile phone and the mobile phone. Please uninstall some third-party applications or back up important data before restoring the phone to factory settings. Running too many applications at the same time may lead to a black screen. Temporarily close unwanted applications in the background: Settings-Manage applications, select the application to close, then click Stop and follow the onscreen instructions to close it.

If the mobile phone is preset with the "Mobile Manager", you can close the application through the mobile phone manager: for it, enter the "Mobile Manager" interface, click "Mobile Phone Acceleration" or "Accelerated Optimization", and end the application running in the background with one button. If the problem still exists, please contact customer service or take the purchase invoice to the service outlets for maintenance.