1, open the phone unlock screen;

2. Enter the phone function page, find the function icon of "Settings", and click Open;

3. There are two switching columns above. Select the function of "Common Settings" column, and click to enter Common Settings;

4. After entering the common settings, scroll down the screen and find the menu item "Unlock Style";

5. Click to enter "Unlock Style", find a menu of "Lock Screen Signature", and click;

6. A text input dialog box appears on the screen, where you can input the text you want to express;

7. After input, exit the function screen of mobile phone, and then return to the main page of mobile phone;