If both phones use the same provider, how do you do it?

[wblair536]

Transferring voice mails from one phone to another.

 

[The Paladin]

you cannot since each phone is on a different phone number.

 

[ss202sl]

Depending on the phone. Some phones allow you to back up your voice mail to a computer.
https/macroplant.com/iexplorer/tutorials/how-to-access-voicemail-on-iphone

 

[Alabalcho]

Aren't voice mails stored at the provider' servers?