iPhone 12 mini
It's not possible to use my Visual Voicemail
Solution 6 of 8: Visual Voicemail isn't used correctly
Using Visual Voicemail, you can see a list of the messages you've received on your voicemail, play them back or delete them. You can also record a personal greeting or select a default greeting. To use Visual Voicemail, you need to turn on Visual Voicemail.