To change the voicemail greeting on your iPhone, use the steps in this help page - Visual voicemail - iPhone. Specifically -. Update your greeting. Tap Voicemail, tap Greeting, tap Custom, then tap Record. Or, to use your carrier’s generic greeting, tap Default. Thanks for using Apple Support Communities. Be well.
How do I listen to my own voicemail greeting on iPhone?How do I turn off voicemail? Looking in the voicemail settings and searching for a ‘Deactivate‘ or ‘Turn Off‘ option is an obvious first step regardless of the phone you’re using. If you find the correct option, disabling it will turn off the voicemail function.

Here are several tips to consider when setting up a professional voicemail greeting: Keep it brief and concise. Give options to get more details. Ask for detailed messages. Be enthusiastic and identify yourself and the company name. Use positive sentences. Take messages accurately and completely. How do I change my voicemail greeting? On your Android device, open the Google Voice app . At the top left, tap Menu Settings. In the Voicemail section, tap Voicemail greeting. Next to the greeting that you would like to use, tap more Set as active. How do I delete my voicemail greeting?
You will be asked to delete your current Voicemail greeting. Click on the ‘Yes’ button that appears on the screen if you want to remove that. You can save your new recorded Voicemail greeting or can use the default recorded option. Wait and hear the new Voicemail greeting message that the instructions speak out. If you want to keep that recording as your Voicemail greeting, then save it. Or you can re-record the message to get a different greeting.