The bottom line is that a business’s situation is likely to change often and rapidly, each of which need a unique and applicable voicemail greeting to cover the circumstances and timeline. For example, callers shouldn’t reach a business-as-usual voicemail, and therefore expect a return call within the business day, if the subject they’re calling is out on vacation for two weeks. Such a lack of communication is a recipe to lose that caller’s trust and tarnish the brand’s reputation.
.Oh - if anyone is still curious: I recorded the greeting via the phones custom greeting function, then called to listen to it from another phone, then turned off the phone and called again. Same message. I had wondered if just maybe the phone played the message when on, and the carrier played the message when the phone was unreachable.

Luckily, voicemail recordings are here to help! Surely, you’ve encountered them in the past. A warm, personal greeting, recorded using a real human voice, listing out dial options (“Press 1 for…, Press 2 for…), or simply explaining why the call isn’t available, saying that you can leave a message after the beep!
20. "Hey there, this is [your name] from [your company]. I'm out of the office until [date]. In the meantime, please direct your inquiries to [coworker's name] at [email address]. They can also be reached at [phone number]. Thank you."