Why does the mobile phone flash green in the upper left corner when it is not used?

This is because the function of "the indicator flashes when receiving the notice" in the mobile phone is turned on. When this function is turned on, when the mobile phone receives notification information (SMS, WeChat and other information), it will flash with a green light.

Take Huawei Changxiang 7 mobile phone as an example. If you don't want to display this function, you can set it by the following methods:

1. Open the settings in your phone and find the "Application and Notification" option:

2. Open the application and notification, and find the option of "Notification and status bar settings":

3. Open the notification and status bar settings, find "The indicator flashes when receiving the notification" in the page, and click the switch button on the right to turn this function on or off: