Open your Phone app. Tap Voicemail. Select Greeting. By default, your voicemail will be setup with your carrier's generic greeting. To record a custom greeting, select Custom. Tap Record to begin recording your voicemail greeting. When you finish recording, tap Stop. To make sure you're happy with your new greeting, tap Play.
If you have voicemails saved on a non-smart phone, your best bet is to record them on a computer. This is a method that requires some equipment, but not as much as you might think.

For small businesses, there are a variety of voicemail service providers you can use that offer different features. From transcription and voice to text to more convenient features of handling multiple phones through one number, availability varies by service. Shared voicemail and call routing is intended for multiple access and directing calls to one or multiple phones. Mobile apps are also available that allow you to check your messages from your phone. The below infographic outlines the current state and trends of voicemails.
Here’s a simple clinician voicemail script if you want to keep your message to the point. Hello. You’ve reached Highland Family Counseling Services. We are currently unable to take your call, so please state your name, phone number, and a detailed message after the beep. We will return all calls within two business days.