D17mma Said:
"Missing old voicemails.: I had some very old voicemails that were very important to me saved on my iphone for years. I did not delete them and they are now gone and are not in recently deleted messages. Is there a way to retrieve them?"
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Troubleshooting Deleted Voicemail:
Contact your Carrier:
Voicemails are store remotely on your Carrier's server. So, restoring the iPhone from a backup you not be successful. If they are deleted, then they are deleted. So, from here, go through your Carrier, seeing what service they have for recovering Voicemail. Report back what methods of recovery they have.