Samsung Galaxy Watch4
I can't play music
Solution 2 of 5: The headset isn't working
Bluetooth is a wireless connection which is used to connect to your phone. You can also use Bluetooth to establish a connection to e.g. a wireless headset.
Slide your finger upwards starting from the bottom of the screen.
Press the settings icon.
Press Connections.
Press Bluetooth.
Press the indicator below "Bluetooth" to turn on the function.
Press the required device.
Press the Home key to return to the home screen.