What to do if the Xiaomi Watch S3 crashes or is unable to start up?

For your problem, you can refer to the following methods:
1. If the watch cannot start up, you can connect the device to the charging base, and charge it continuously for more than 10 minutes;
2. If the device crashes or cannot start up despite charging for a while, you can try to force a reboot: press and hold the power button for more than 12 seconds to force a reboot;
3. After the watch restarts and the screen lights up normally, please open the [Mi Fitness] APP to update to the latest version;
4. If the issue still exists, it is recommended to apply to after-sales service for inspection.