1. Synchronize watch faces again through the mobile network of the phone.
2. A Bluetooth communication exception may occur on the phone. Go to the phone's Bluetooth settings, disable and then enable the Bluetooth function, and then synchronize watch faces.
3. If the battery level is below 10%, charge the watch and then try again.
4. If the watch is on an interface that does not support watch face synchronization, return to the main watch face and try again.
5. If a function running at the background prevents the downloading of watch faces, restart the watch and then synchronize the watch faces.
6. Reset the watch, rebind and reconnect the watch, and then synchronize watch faces.
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