get a free account @ Visual Voicemail For Your Phone | YouMail. Pay the $1.99 for the MagikMail app in Windows Store. Its worth it. I get comments all the time on the smart greeting from friends and it bypasses the standard 2 minute 38 second greetings the carriers use.
You can try before you buy or use the free version. I paid up for the ad free version and have been using it for years. I found it worth it.