1. Open the settings of the mobile phone. You can find the setting icon on the main screen, and click to enter the setting interface.

2. In the setting interface, find and choose to enter the smart assistant or similar options. This option will be different in different mobile phone models and operating system versions.

3. In the smart assistant interface, find and click the smart voice or similar function option.

4. In the intelligent voice interface, you can find voice wake-up or similar setting options. Click to enter this option.

5. In the voice wake-up setting interface, wake-up words can be set. Enter the wake-up word you want to use, and then save the settings.

6. After the voice wake-up function is turned on, you can use the wake-up word to activate the AI mode, and the mobile phone will enter the AI mode, ready to receive instructions.