The service also recommends stating your name, apologizing for missing the call and that you will call them back. If possible include a time frame for a return call. Don’t ramble or include un-needed information.
.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.

18. “Thanks for calling [Company name/your name]. We hope you’re enjoying the holiday season. We aren’t available at the moment due to our holiday hours. Leave your name, number and the reason for your call and we’ll get back to you ASAP! Thanks for calling.” Everyone deserves a break. Let your callers know although you might be enjoying one too, that their needs are important.
While email and text support saw an increase in recent years, many customers, partners, and potential hires still prefer to call your company directly. When writing your voicemail script, include basic information such as a short greeting, your company name, an invitation to leave a short message, and the time frame in which the caller can expect a return call. If relevant, you may want to include your office hours, extensions for company departments, and the contact information for your office manager or HR department.