The device password is disabled by default. If it is detected that you are not wearing it, the device will be locked. After re-wearing it, switching from [Pebble mode] or [Necklace mode] to [Band mode] on the band or restarting, you need to enter the password to unlock it.
You can set the password by the following paths:
1. Open the [Mi Fitness] APP >> [Device] >> [Set password] >> [PIN] >> enter the password;
2. On the band, open the [Settings] APP >> [PIN] >> [Set PIN].