How does the Xiaomi Watch S3 stay connected to the Mi Fitness APP?

Q: How does the Xiaomi Watch S3 stay connected to the Mi Fitness APP?

Please set the [Mi Fitness] APP as a whitelist and lock it to run in the background. Ensure that the Bluetooth will not be turned off, and it remain the distance, within which the watch can always connect with the phone successfully.Note:The setting methods vary for different mobile phone models. Please go to the [Mi Fitness] APP >> [Device] >> [Background permissions] and follow the specific setting methods and prompts for operation.

Please set the [Mi Fitness] APP as a whitelist and lock it to run in the background. Ensure that the Bluetooth will not be turned off, and it remain the distance, within which the watch can always connect with the phone successfully.
Note:
The setting methods vary for different mobile phone models. Please go to the [Mi Fitness] APP >> [Device] >> [Background permissions] and follow the specific setting methods and prompts for operation.

Does it help?

Yes