Samsung Galaxy S8+
It's not possible to receive voice calls
Solution 1 of 4: Missed calls are diverted too fast
To receive voice messages, you need to divert your calls to your voicemail. Before you can divert calls to your voicemail, you need to save the voicemail number.
Press Phone.
Press the menu icon.
Press Settings.
Press More settings.
Press Call forwarding.
Press Voice call.
Press the required divert type.
Key in +447953222222 and press ENABLE.
Press the Home key to return to the home screen.