It’s a good practice for each of your team members to have their own personal business phone numbers. There are many reasons why they shouldn’t use their personal cell phone number for business, so you’ll want to give them their own phone number through your VoIP provider or phone system.
A professional voicemail should be short and succinct. Simply introduce your company, ask the caller to leave their information, and let the caller know when to expect a callback. Once you record your greeting, you can easily upload it into the OpenPhone app. Simply go to your phone number’s settings, then choose to record a greeting, upload an mp3 file, or use text-to-speech.

Give them a reason to call you back. In both voicemail messages, did you noticed how I mentioned new information they might be interested in? That will grab their attention more than simply introducing yourself, thanking them and asking them to give you a call if they have any questions. Come from a place of helpfulness by giving them something to look forward to and that will solve a problem.
Website: https://www.sprint.com/en/support/solutions/device/change-your-sprint-personal-voicemail-greeting.html