"Producing my audiobook with On Air Audio Studios was a superb experience from start to finish! From sourcing and auditioning voice talent to delivery of the completed audio files, Bruce was on top of every part of the process with clear communication, on-time deliverables, and an attention to detail that far exceeded my expectations. Even though I was just one of many clients, Bruce made me feel as though my project was his top priority at all times. If you’re looking for professionalism, quality, and top-notch service, On Air Audio Studios should be your first (and only) choice."
If someone is listening to your voicemail greeting it's only because they intend to leave you a message. Don't make them listen to 3 minutes of rambling in order to do so. Plus, you're more likely to deliver a clean, professional read if you stick to shorter greetings. If more specific information is needed, direct callers to where they can find it on your website.

Microsoft’s 2015 Global State of Multichannel Customer Service Report concluded that the telephone is still the most-used customer service channel in the United States (81%), followed closely by email (78%). And with so many consumers still picking up the phone, voicemail may still be necessary.
Cell phone voicemail greetings are generally more personal and casual than office phones. Consider a greeting like “Hello, you’ve reached [your name]’s cell phone. I can’t take your call at the moment, but if you leave a brief message, I’ll get back to you as quickly as possible.”