Sony Xperia 5
It's not possible to receive messages on my voicemail
Solution 3 of 3: Incoming calls aren't diverted to your voicemail
To receive voice messages, you need to divert your calls to your voicemail.
Press the phone icon.
Press the menu icon.
Press Settings.
Press Calling accounts.
Press Call forwarding.
Press the required divert type.
Key in +447953222222 and press TURN ON.
Press the Home key to return to the home screen.