Choose your busy greeting from the drop-down menu next to If busy use greeting from: System—This plays the system default greeting. Personal—If this option is selected, choose the file to upload.
Turn this feature on via the account center to hide your name and number on all calls you make. You can also hide your number on a per-call basis by dialing *6 7 before making a call.

Writing a script doesn’t mean you have to write a speech. A simple greeting is fine, like this sample voicemail message:
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.