Even in today's fast-paced world, customers don't like being greeted with an automated message. According to the New York Times, callers of a certain age are put off entirely if they are answered by a voicemail instead of a real person.
People have short attention spans these days, and you should always craft your communications for the lowest common denominator with something as universal as your voicemail.

If you are ready to record your voicemail greeting, you should already have a solid script. Whether you include your mission statement, some fun personal details, or a favorite quote, making your voicemail greeting personal is a great way to set your business apart. Write down what you're going to say, but try to avoid reading it verbatim as you record, or it may start sounding robotic and rehearsed. When listening to your voicemail greetings your callers shouldn't feel like they're listening to an impersonal recording. Keep it conversational. If you need help achieving that conversational tone, check out these tips.
Open your phone’s voicemail app, then tap (or in some cases, tap and hold) the message you want to save. You should be presented with a list of options; the save option will usually be listed as “save”, “save to phone,” “archive,” or something similar.