Creating a voicemail greeting might not be fun, but with the scripts I’ve shared, you should have an easier time. No need to practice time and time again — simply plug in your name, company title, and other details, then read it out loud to your phone’s voicemail greeting recorder. With a professional greeting, you’ll continue nurturing prospects even if you don’t pick up the phone.
When you leave a voicemail do not use your full name because that immediately raises a red flat that you are a salesperson making a cold call. Instead, say your first name only followed by your company name. This will make your customer feel that you are much more familiar with each other than you really are. Saying your last name would defeat the whole purpose of demonstrating familiarity.

To set these options via the softphone (desktop app) or the telephone connected to the magicJack device, select the Vmail button then press zero (0) to select one of the above recordings.
Website: https://www.sprint.com/en/support/solutions/device/change-your-sprint-personal-voicemail-greeting.html