Android: How to setup a voicemail greeting

On the home screen click on the phone icon
On the next screen click on the Visual Voicemail Icon.
Click on the three dots in the top right corner.
Select settings
Click on Voicemail Greeting
Wait for the next screen to load. (this takes a couple of seconds) Select Custom Greeting
On the popup click on record to record a custom greeting.. Click on the record button again to stop recording and hit save to save your greeting.