I have problems making WiFi Calls on my Samsung Galaxy S25

Slide your finger downwards starting from the top right side of the screen.

Press the settings icon.

Press Connections.

Press the indicator next to 'Wi-Fi Calling' to turn the function on or off.

Press the Home key to return to the home screen.

Slide your finger downwards starting from the top right side of the screen.

Press the settings icon.

Press Software update.

Press Download and install. If a new software version is available, it's displayed. Follow the instructions on the screen to update the phone software.

Simultaneously, press the Side key and the lower part of the Volume key and keep them both pressed until your phone restarts.