1. Turn on the phone and unlock the screen. There is no text at this time;

2. After entering the mobile 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", and then click "Lock Screen Signature" menu;

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;

8. After the phone automatically locks the screen again, click the Open button to open the lock screen. A line appears above the gesture password, which is the signature file just entered.