1. Method 1: Open the phone settings page. Find the "Wallpapers and Fonts" option on the settings page. In the Wallpapers and Fonts option that opens, select the Lock Screen Locally option. Select a pattern in the local lock screen, and click "Apply" to switch the lock screen wallpaper.

2. Method 2: Open the mobile phone photo album. After selecting the lock screen picture, click the icon with the arrow below. In the new pop-up window, choose to set the picture as "wallpaper". After cutting, click "Lock Screen Wallpaper" to switch the lock screen wallpaper.