For your reference, the unbinding methods are as follows:
1. For Android phones, open the [Mi Fitness] APP and tap [Unpair] on the [Device] interface;
2. For iOS phones, open the [Mi Fitness] APP, tap [Additional settings] on the [Device] interface, and then tap [Unpair].

Note:
1. After unbinding, the watch will be restored to factory settings and all data will be cleared;
2. After the watch is restored to factory settings, it will automatically unbind from the phone.