From the Phone app, tap Calls.
Tap the Menu icon.
Tap Voicemail.
Tap Edit.
Tap Select.
Select the message you'd like to delete.
You can select multiple messages at once.
Tap Delete.
All deleted messages are sent to your Deleted Messages folder.
Tap Deleted Voicemails.
Depending on the amount of voicemails you have, you may need to scroll to see this option.
Tap Clear All.
You've completed the steps!
