Use our web app (https://web.phone.com) to change your voicemail.
Go to Settings, then Voicemail.
Then setup your voicemail in any of these ways:
Text to speech: Type your message into Text To Speech field, select a voice and click on the Save button. Your greeting will be available for listening in a moment.
Custom File: Upload your professionally recorded greeting, click on the save button and listen to your file with our audio player.
Record Audio: Press and hold the recording button to create your custom recorded voicemail greeting, save and listen on a Custom File tab.
The last saved file will be auto-applied as your Voicemail custom greeting file and will be active right away.