Why is the data on the Xiaomi Smart Band 10 not synchronized to the phone?

If the data on the Xiaomi Smart Band 10 isn’t synchronized to the phone, please refer to the following reasons:
1. When many APPs are running in the background for an extended period, if the Mi Fitness APP is remove from the background, the band will disconnect from the Mi Fitness APP and data synchronization will be affected. To sync data, you need to enter the Mi Fitness APP for automatic reconnection and data synchronization. After the APP is removed in the background, reopening it will automatically reconnect the Xiaomi Smart Band 10 for normal synchronization;
2. The APP being removed from the background is primarily due to the APP using up the RAM. To free up sufficient resources for newly opened APPs, the system needs to terminate some background-running APPs to free up RAM. The frequency of being removed in the background varies depending on the device model and iOS software version. For example, on an iPhone 12 with iOS 16.3.1 and 4GB of RAM, running 4 APPs will remove the APP from the background. However, on the iOS 16.4 official version, running 5-6 APPs will not remove the APP from the background. This varies depending on specific APPs, such as the camera APP which consumes more memory.