Apple Watch – Delete Paired Bluetooth Connection

Note Notes:

The steps below apply to the Apple Watch® Series 3 and newer models.
If you are unpairing your Apple Watch from your iPhone, you must reset your Watch before pairing with a new iPhone.
These steps outline how to unpair a Bluetooth® accessory (e.g., headphones) from your Apple Watch.

From the Watch face screen, press the Digital Crown to access the Apps screen.
Tap the Settings icon then tap Bluetooth.
Tap the Info icon next to the Bluetooth accessory you want to delete.
Tap Forget Device.