You don’t want to answer calls 24/7 (unless you’re serving clients globally and there’s an expectation of 24/7 support). If you’re unavailable during specific hours of the day, use the voicemail examples below for after-hours business calls.
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.

Last but not least a slogan or branding: this is really more important for new customers and people that are calling or leaving a voicemail for the first time rather than returning ones (though it helps a little with them too!). A catchy phrase makes it easier for people to remember your name and recognize you when you give them a call back.
Wexler says the bank's chief financial officer was searching for budget cuts that wouldn't hurt too much. Limo services was one. Voice mail, it turned out, cost $10 per person per month and, intuitively, it seemed ripe for the chopping block.