You have reached the , Strategic Air Command Nuclear Missile Storage Facility. We are unable to come to the phone right now. At the tone, please leave your name, number and target or list of targets and we’ll launch as soon as we can. And have a nice day.
You can set when you would like to send callers to your voicemail. For example, you may want to send all calls to voicemail when you know you’re going to be out of the office and not taking phone calls. 1

-Hello. All of our operators are busy right now, but if you’ll leave your name, telephone number, a brief message, and the time you called, we’ll get back to you as soon as possible. Thank you and have a pleasant day.
If your carrier supports the iPhone voicemail feature, you can retrieve and listen to your voicemail right from within the “Phone” app and call your contacts back by simply tapping their messages. That type of functionality is pretty neat and useful, because it saves you actual time. If not supported by your carrier, you will not be able to see the visual overview of your voicemail inbox and use any of the related features. Tapping the “Voicemail” tab in your “Phone” app will simply call the number associated with your voicemail box. So let’s get going with creating our custom voicemail greeting on iPhone! How to record your own Voicemail on iPhone Phone → Voicemail → Greeting → Custom → Record → Save