If you're using your carrier for vm you have two options I believe for setting a sound. In your contacts if you have one for vm you may be able to set an individual ringtone for it there, but either way it should use your default notification sound. Then to get a different sound for your texts you should be able to set that in the app. The options are usually to use the default sound or set a sound and when a set sound is chosen the app will use that sound vs the phone's default.
Posted via Android Central App