1. Turn off and restart the watch, insert the SIM card and connect the watch to the Internet, then charge it and try again.
2. Enter imoo app > More > Watch’s Firmware Update > Enable Auto update > Enable Download Software Updates with Data.
3. If the situation continues, long press power “On/Off” button twice on the back of the watch. “Restore” will appear. Click “Restore” and the watch will automatically restart. After restoring, the watch can be used normally.