1. Open the settings first. Settings are divided into common settings and all settings. Click all settings to enter all settings pages. On all the settings pages, there is a display. Click Display to enter the display page. The fifth line of the display page has font options. Click to enter the font interface. Click the current font in the first line.

2. Open the settings on the mobile phone and click "Lock screen, password, fingerprint" on the settings page. 2 After opening, click "Advanced Settings for Lock Screen" here. In the advanced settings page that opens, there is a "lock screen signature".

3. The mobile phone can only add lock screen text or customize the operator name. Turn on the phone, and then click Settings to enter. Then select the notification bar and status bar to enter. Then customize the name of the operator. Because the custom lock screen text can't show the effect after changing the theme, the method of custom operator is more practical.

4. Open "Settings" on the phone desktop, as shown in the figure below. After entering the "Settings" page, find "Lock Screen, Password, Fingerprint" and click to enter, as shown below. Select "Screen Lock Advanced Options" on the "Screen Lock, Password and Fingerprint" page to enter, as shown in the following figure.