Instead of stating the obvious, enhance your message with information your callers can use, such as how to reach someone immediately, when you will be returning calls, or where they can obtain after-hours service. Services that offer multiple custom greetings like Tendant allow you to store multiple greetings so you can have a greeting just for a holiday that you can use every year. Specify the information you want callers to leave. Your voicemail greeting presents a great opportunity to gather important details that will help you better serve your customers. This may include account numbers best times to return the call, and of course, a brief summary of the issue or purpose of the call.
Hello, it’s obvious you have bad timing, because nobody is home. Please leave your name, telephone number, and a brief message in a voice similar to mine, and your call will be returned as soon as humanly possible.

However, like all technologies voicemail's utility has diminished over the years. Now there are far more efficient messaging services available. Text messages, instant messages via social media, and emails are all a more robust and effective way to deliver a message.
There are a couple of ways to evaluate the costs for a small business phone system. If you're adding or replacing handsets or other hardware, you'll have to determine up-front costs separate from ongoing service fees.