4 Voicemail Still Full After Deleting Messages?
Deleting voicemails is one way to free up some storage space on your phone. But you may notice that your voicemail inbox still shows messages being stored even after they’re deleted. That’s because there’s actually a hidden “Deleted Messages” section and they’re still using storage space there.
Just scroll to the bottom of the Voicemail section in the Phone app and you may see Deleted Messages if there are messages that can be undeleted. From there, you can tap Clear All in the top-right to permanently get rid of them. Alternatively, syncing your iPhone with iTunes also does the trick.