How to set it? Only the following two steps are required:
1, change the iPhone name.
Go to iPhone Settings-General-About this machine, tap the name and edit it. You can edit your favorite sentences at will.
2. Set widgets on the iPhone home screen.
Press and hold on the lock screen to enter the wallpaper editing page, select your favorite wallpaper, and click Customize.
In the gadget, select the battery, then select the long gadget and add it to the home screen to display the power and the signature just set.