We use our phones for everything: looking up directions, surfing the internet, texting, and even the lesser-known function of making actual phone calls. Even though in our personal lives, true phone calls are going by the wayside, they are still a huge part of how we communicate in the workplace, and along with phone calls, so too, are workplace voicemails.
Don' let background noise do the talking for you. Ambient noise on your recording could be sending the wrong message to your clients. The sound of your kids arguing in the distance could be the sign of a distracting work environment. Clinking glasses and restaurant chatter may leave the impression that you don't take your work seriously. When you record your voicemail greeting choose a quiet spot free from interruption, so your message is the only thing callers hear. It's also good to avoid large, cavernous spaces where sound verberates.

This ensures understanding and helps the prospect write it down accurately. However, don’t repeat yourself—say the same thing in a different way.
Hello, this is [Your Name] from [Company Name]. I'm calling because [insert reason for calling]. I'd love to talk to you about [insert benefit you can offer if they call back]. My number is [insert phone number]. I'll also follow up with an email tomorrow. I look forward to hearing what you think. Have a great day. Goodbye!