How to permanently save a voicemail on iPhone 4S?

To put it simply, my dad died three weeks ago and I have a number of random voicemails on my phone from him that I want to keep for a long time just to hear his voice say he loves me. I know that the voicemails eventually delete, is there a way I could like put them on my computer or something?

First of all sorry about your dad Julie. To save the voice mail you can save it to your PC (in case you need a backup).Go to iTunes and work it out