Finally, make sure to speak clearly and slowly. Don’t mumble, and make sure your greeting is free from background noise. Nothing paints an unpleasant and unprofessional company image more than a voicemail greeting with static noise, traffic sounds, or colleagues talking in the background.
While phones and other devices are getting better all the time, there are frequently problems with audio recorded on low-quality equipment. Static pops, grainy voice quality, and background noise interference are all common with audio recorded on non-professional equipment.

Humor also leaves a lot of room for misinterpretation—which subsequently weakens sincerity and authority. A caller can be very turned off by merely misinterpreting your joke. Why take this risk? Additionally, this could even cause callers to question your character. Say, for example, the president of a company’s mobile phone voicemail greeting was funny. What’s to happen if the caller didn’t like or get the joke? What if they found it offensive? Another scenario is that a caller is reaching out to you for the first time—i.e. they have no idea regarding your personality. What next? The point is, with this type of greeting, humor is bound to be more divisive so just avoid it altogether. c. Poorly Pacing Your Message and Bad Time Management: Don’t speed through your message. Speak clearly so callers know what to include in their message and when to leave the message. At the same time, don’t drag your message out. No one wants to sit through a diatribe. Just get to the point clearly.
The thing with voicemail is it can be really handy when it comes to catering to your prospects when you are not available after work hours.