Please refer to the following information about setting screen lock nicknames and personalized signatures:

First, the method of setting the screen lock nickname and personalized signature

Enter the theme I-Recommendation-Click on the input box above to enter the search-Go to the "Lock Screen" on the right-Enter "Lightness and Simplicity" or "Lightness and Pleasure" to search, download and apply the lock screen style, then press and draw the avatar, without unlocking the screen interface, and click "+"to set the nickname, signature and avatar.

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.

If you still have more doubts, you can enter vivo official website-My-Online Customer Service-Enter labor and consult online customer service feedback.