The Xiaomi Smart Band continues to display a missed call reminder even after the call has been addressed in various ways, such as hanging up the call on the phone or band, replying via text, or ignoring the call.
For your reference, the reasons and solutions are as follows:
This behavior occurs because the missed call notification is sent directly by the phone's system, and it functions independently of the wearable device or the Mi Fitness APP. Neither the wearable device nor the Mi Fitness APP can control or clear these system-generated notifications, as they are managed entirely by the phone's operating system.
To dismiss the reminder, you need to manually clear the missed call notification directly from your phone's notification panel. It is recommended to keep the phone's software up to date, as future updates will address this limitation or provide additional options for managing notifications more seamlessly.