Speaking slowly also gives the listener on the line the opportunity to write down your message. Remember that people write slower than they talk. If you don’t speak clearly and slowly enough, your target listeners won’t be able to catch up, or they may even write the wrong information, making your message ineffective.
Don’t forget Packet8 business services. They have a virtual PBX, with real extensions, the ability to have the system forward calls to your mobile phone and actual equipment (if you want/need it). We’ve been using them for the past three years successfully with employees all over the U.S.

Informal voicemail greetings are those that don’t adhere to the rules of professional and business voicemail greetings. Here, you are free to just leave a simple greeting, or use it to show your more witty side. This style of greetings can be used for both home and business if you like, depending on the type of caller you expect. For instance, a novelty shop could probably create a rather informal message, using sound effects that represent the type of items they sell.
Hello! You’ve reached [Luke on the Customer Success Team at LinkedPhone]. Our office is currently closed but rest assured your call is very important to me. Please leave your name and number and let me know how I could be of service to you. I’ll return your call on the next business day. Thank you!