I’ve gotten reports of people upgrading to iPhone 6/6+ recently and when they restored from backup, their saved voicemails didn’t come back. There are paid-for tools online to recover your voicemails, but I went on the hunt for a free way to do it. Mike Reyes wrote up instructions on how to do it from the Terminal that gets the job done. It’s a relatively geeky path and I thought it would be helpful to have a more visual version of his instructions so I wrote up a full tutorial here:
https://www.podfeet.com/blog/how-to-recover-your-voicemails-from-an-ios-backup-on-a-mac-for-free/