What are the requirements for the Bluetooth connection between the Xiaomi Smart Band 10 Ceramic Edition and the phone?

For your reference, here are the requirements for the Bluetooth connection between the Xiaomi Smart Band 10 Ceramic Edition and the phone:
1. For better using band, it is recommended to keep the Mi Fitness APP running in the background. To avoid memory cleaning and interference from some management software on Android systems, please follow the instructions on the APP: Mi Fitness APP >> [Device] >> [Notifications and calls] >> [Background permissions];
2. The iPhone cannot perform background protection for APPs. When the APP is removed in the background, the Bluetooth connection will not be disconnected and message notifications can be used normally. However, other APPs syncing data such as weather, workout, health monitoring, events, etc. will require reopening the Mi Fitness APP;
3. Enabling power-saving mode on the the iPhone will result in decreased Bluetooth connection stability and potential disconnection issues;
4. The APP needs to enable the location permission [Always allow] to ensure that the APP background remains connected.