How to fix: Xiaomi Mi Band stopped tracking steps and sleep

Image may be NSFW.
Clik here to view.A few days ago, my Mi Band stopped properly tracking sleep and counting steps. Here is a full list of symptoms:

• synchronization appears to work correctly;
• total count of steps is updated, but when you click it – there are no per-hour details;
• after sync completes, there is no green message “Updated X items”;
• night sleep tracker does not update at all: neither total hours slept, nor per-hour details;
• the band is otherwise functional, e.g. “Find the band” works – it vibrates and flashes diodes.

Warangelo00 found a solution, which worked for me:

1. enable Bluetooth, if it is disabled;
2. start Mi Fit, go to Settings – Incoming calls;
3. enable it – set to some timeout (e.g. 3 seconds) instead of the Off option;
4. now call your mobile phone from a different one – wait for the band to vibrate and flash lights;
5. you should now be able to refresh Mi Fit main page, and see both current day and previous night per-hour details; it should also show the green “Updated X items” message after syncing;
6. you can now disable incoming calls notification if you don’t need it.

Not sure if this fix will last, but it did help me – thanks, Warangelo00!

Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.