Your voicemail message should ideally answer all of the following requirements: Brief -- nothing bores callers as much (or makes them hang up as often) as long voicemail messages; Informative -- if it's your professional voicemail, say your name, …
Cell phone voicemail greetings are generally more personal and casual than office phones. Consider a greeting like “Hello, you’ve reached [your name]’s cell phone. I can’t take your call at the moment, but if you leave a brief message, I’ll get back to you as quickly as possible.”

Fortunately, there are steps you can take to improve your business voicemail greeting that will delight everyone who hears your “new and improved” greeting. Identify your name and your company name. The last thing you want is to miss an important voice message. But the truth is many callers are more likely to hang up if they aren’t sure whether they’ve contacted the right person or business.
Before even making that phone call and leaving a business voicemail, you need to take the time to think every message through. Take notes or have a sheet of paper containing all the information you need to say. Especially if you’ve recently changed your offers or if this is your first time to leave voicemail messages, thinking your message through ensures that you exude confidence and professionalism upon making the call.