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.
3. "Hey, this is [your name]. If you're calling for [X reason], please [contact so-and-so] or [go to our website, send me an email]. For all other inquiries, leave your name and a brief message and I'll call you back within [one, two, three] business day[s]."

Hello, this is (your name). I’m sorry but you’ve reached my old number. Call me on (your new number) and I will try to take your call. If you can’t reach me there as well, leave me your name, number, and reason for call. Thank you.
“Hey there! This is [name] at [XYZ company]. Thank you for calling. I can’t take your call right now but if you leave your name, contact info and reason for calling, I’ll call you back right away. Take care and speak with you soon!”