But the questions you ask in a voicemail should be so specific that they could never be intended for another listener. For example, if I was selling financial management technology, I might ask the voicemail recipient which financial software they use today, or if all of the company's financial analysts work out of the central office.
Because you never know the quality of someone’s phone audio or your cell phone service, it's not a bad idea to give your name and phone number twice within your message. The thought being, if the person you called can’t understand who you are or how to call you back, how can they be expected to return your call?

In an email, you may end by telling the contact what you want them to do next. In a voicemail, though, ending with something like, “Call me back,” or, “If I don’t hear from you, I’ll call next week,” can discourage the person from responding.
Hello! Thanks for calling [LinkedPhone’s Customer Success Team]. We are currently helping other customers achieve their goals and want to do the same for you! Please leave a message with your name, number, and a brief description of how we can serve you. We promise to return your call [before close of business today]. In the interim, you can also check out our website at [linkedphone.com] for helpful answers to our most common requests. Thank you.