Solutions:
When the band has bound to the mobile phone and in the range of effective Bluetooth connection, if other bands need to be re-bound, the band needs to be unbound first. The specific operation method is as follows:
1. Select "My band" >> "unbind" in the function menu, and then select "bind new band". After binding the new band, the unlock function needs to be reset.
2. When the band has been bound to the mobile phone but the two sides are not in the range of effective Bluetooth connection, if other bands need to be re-bound, the drop-down status list will automatically search for the binding without the need for unbinding in the software.
3. the disconnection or loss of the band will not affect the synchronized data in the previous MI account. When the lost bracelet is used by others, the band will not synchronize the previous data due to the difference in the binding of the MI account.