How does Huawei mobile phone open the "test" mode of information display?

1. First, open the phone desktop and click the dial button.

2. Next, you need to dial the interface and enter a string of characters "*#*#2846579#*#*".

3. Next, you need to enter the project menu interface and click "Background Settings".

4. In the background setting interface, click "Background Debugging".

5. Next, enter the background debugging window and click "Open" to enter the test mode, as shown in the following figure.

6. After the setting is completed, the "test" mode will be displayed when the mobile phone enters the information interface.