Samsung Galaxy Watch4
I can't make voice calls
Solution 1 of 7: Flight mode is turned on
You can turn off all wireless connections so your smartwatch can’t cause any interference with sensitive equipment in a plane or a hospital. You can use many smartwatch functions when flight mode is turned on, but you can't receive calls or messages.
Step 1 of 2
Slide your finger downwards starting from the top of the screen.
Step 2 of 2
Press the flight mode icon to turn the function on or off.