How to open Huawei mobile phone with unknown source?

1. First, the first step is to unlock the phone screen and find the settings icon on the desktop.

2. Then click the menu item "More Settings" on the opened mobile phone settings page, as shown below.

3. Then click the menu item "System Security" in the opened page with more settings.

4. Then find the setting item of "Unknown Source" in the opened system security page, as shown in the figure below.

5. Then click the switch behind the setting item and set it to the open state. A prompt message will pop up to confirm that you want to open it. Click OK.

6. Finally, return to the system security page at this time, and you can see that the switch behind the unknown source has been set to on. In this way, mobile phones can install applications from unknown sources in the future.