If you can get your voice mail greeting professionally recorded, then definitely consider it! These greetings sound great and can have a strong “corporate” or “important” feeling to them. When they are done properly, these recordings can be very memorable and get a lot of attention. A professional voice talent can be hired to make your greeting sound fantastic. Yes, they might be less personal, but they are certainly professional. So it’s up to you which image you want to portray. If you use a web-based voice mail system like Solaxis, then you can upload these recordings directly into your voice mail system.
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.”

A bubble in the space-time continuum has connected your line to a channeler in the 23rd Century. Any message you leave will be broadcast into the future….
Friends and colleagues speak to each using first names only. So do people of authority. They do not call each other and leave voicemail messages asking for Mister, Miss, or Mrs. Therefore, when you call a person you want to do business with and you leave a voicemail message, refer to them by their first name only. Don't say mister, miss, or misses. Don't say their last name. Begin your voicemail message by saying only "hi/hello" followed by the person's first name. Or, you can even forget the "hi/hello" and just say the person's first name. That is how you show confidence and authority and separate yourself from weak salespeople.