Samsung Galaxy S23 Ultra
Android 13
1 Find "Call forwarding"
Press the call icon.
Press the menu icon.
Press Settings.
Press Supplementary services.
Press Call forwarding.
2 Divert calls to voicemail
Press the required divert type.
Key in +447836121121 and press Enable.
+447836121121
3 Return to the home screen
Press the Home key to return to the home screen.