Make it as easy as possible for your prospects by including your phone number near the beginning of the message, then repeating your contact information near the end for good measure.
Website: https://www.propertycasualty360.com/2005/08/10/secrets-of-successful-time-management/

IVR MESSAGE/TREE MESSAGE . This is the interactive message (ivr: interactive voice response) that you use to ask the user which extension they want to talk to. It is also called a "tree message" because there can be more than one of these messages, depending on how the company and its switchboard are structured, maybe one for each "branch".
I have a confession to make: I haven’t recorded a new voicemail greeting since 2014. In the past four years, I (hopefully) have become more articulate, poised, and self-assured. But hear my voicemail recording, and you’d think I was still new to the work world, a little unsure of myself — and probably not an authority. Obviously I need toupdate it. And if you haven’t changed your voicemail greeting in over a year, you’re likely in the same boat. After all, a professional voicemail recording boosts your credibility, makes you seem more competent, and encourages whoever’s listening to it to continue the relationship. A relatively unprofessional one — like mine, for instance — does the opposite: It encourages prospects, recruiters, and potential connections to run in the other direction. With that in mind, I’ve written 18 unique voicemail greetings for every situation. Pick your favorite, practice a few times, then record your new voicemail.