Nokia Lumia 820 - What is visual voicemail and how do I switch it on?

The visual voicemail let you see your voicemail messages in a list and play them on your phone. If your operator does not support this implementation, you will only see the traditional voicemail option on your phone.

To switch on visual voicemail, tap the phone icon, tap ... > settings, and switch Visual voicemail to On.

To listen to your voicemail messages, tap the phone icon, swipe to voicemail, and tap a message.