1. Enter the I theme and set the lock screen style of the mobile phone to "light simplicity" or "light pleasure". Note: If there is no "light simplicity" or "light pleasure", it means that this model does not support setting screen lock nicknames and personalized signatures.

2. Click on the lock screen icon in the lock screen bright screen interface to slide down (some models hold down the lock screen icon), and click the "+"sign in the pop-up interface.

3. After jumping to the setting interface, you can edit the nickname and personalized signature, select the color, and finally save.

Note: The screen lock nickname can be edited up to 6 characters.