1. Open the Xiaomi Sports App of Mi band 8 and connect the bracelet.

2. On the homepage of the App, click the "My" tab to enter the personal center page.

3. On the personal center page, select the "bracelet settings" option to enter the bracelet settings page.

4. On the bracelet setting page, select the "dial setting" option to enter the dial setting page.

5. On the dial-up settings page, you can select an existing dial-up or a custom dial-up. If you want to change the dynamic wallpaper, you need to select "Custom Dialing".