
When you stop using Xiaomi Mi Smart Band 4 with a phone, removing the existing pairing is an important device-privacy step. The flow below uses the Mi Fit app on an Android device and assumes the band is already paired.
[reference] Title: Unpair Text: Removes the current connection between Xiaomi Mi Smart Band 4 and the paired phone through Mi Fit. Title: Device data Text: Before giving the band to another person, check that the information you intend to remove is no longer available on the band. Title: App data Text: Records associated with the app or account should be reviewed separately when your goal is broader data removal. [/reference]Before You Unpair
[checklist] * Mi Fit is installed on the Android device * Xiaomi Mi Smart Band 4 is currently paired with that device * You are ready to remove the existing phone-to-band pairing [/checklist] [warning] Unpairing removes the device connection. Do not assume that it also removes every record associated with the app or account. [/warning]Remove the Existing Pairing
Open the Mi Fit app on your Android device.

Continue in the Mi Fit app.

Tap the Profile icon at the bottom.

Select XIAOMI Mi Band 4 from the device list.

Scroll to the bottom of the device settings and tap Unpair.

Confirm by tapping Unpair again.

Allow a few seconds for the band to disconnect from the phone.