1. First, open your mobile phone and enter the desktop, then find the Tik Tok icon on the desktop and click Open. After entering the Tik Tok interface, click My Options in the lower right corner.
2. Then we will enter my interface in Tik Tok. We can see our background picture at the top of this interface. If you want to set a background picture, click this picture.
3. Then we will enter the background picture interface, and we can click the replace button at the bottom of the interface.
4. Next, make a selection in the pop-up menu. We can choose a photo from a gallery or a mobile phone album.