Connecting a Bluetooth device to a Yealink Zoom phone
Tap the 3 dots located in the lower-left of the phone's screen and then tap Settings.
Tap General and then swipe to the bottom to find and tap on System Settings.
You should see Bluetooth in the lower-left of the screen. Tap on that. Put your device in pairing mode and select it when it shows up under Available Devices.
Tap the home icon in the upper-left of the screen to return to the Home Screen.