You could add the words "After-Hours Service" or "After-Hours Line" after the company's name. That way there's no concern over whether it is indeed a number that reaches a real person who will return their call during non-business hours. It's a way to let them know they're on the right track. If that makes sense. :)
Press the Program ButtonScroll to Phone Setup and press Enter (it’s the center navigation button)Scroll up to VoiceMail Setup and press EnterScroll up or down to access individual settings

To do this, you can simply say, “I look forward to speaking with you and resolving any issues or concerns you might have as quickly as possible.” This implies you’re going to read your messages, you’re going to respond to those messages, and you’re going to resolve any issue, regardless of how big or small, the customer has. Acting as a mentor by making yourself more accessible is a great way to improve the overall customer experience. Having your business voicemail greetings reflect this is a great way to show customers where your priorities lie even if you’re unable to get to the phone right now.
This application is developed by Virtual Network Apps and comes in pretty small download size, as tiny as 4.50 MB. You don’t need to worry about the phone’s memory as My Visual Voicemail won’t give a significant burden to your device. So far, this app has been downloaded over 100,000 times.