Another great information you can put in your voicemail messages is to inform your prospects when you can reach out to them say the next morning or mid-afternoon and more so that they can be aware of when they can expect a call from you.
The phone you use to record your greeting – and your surrounding – can turn your carefully scripted greeting into an unprofessional mess. Background noise is terribly distracting, so choose a quiet room or parked car to make your call. Landlines, or a “wi-fi enabled” cellphone call, can provide much better connection quality than a standard cellphone. If you must use a cell phone, be sure to use a high-quality headset for the best clarity.

Some voicemail greetings are too loud and distracting and some are so quiet you can barely figure out who you’ve called. Whoever sets up the voicemail greeting for a business should be a confident speaker. Here’s a pro tip—write out a script of what the voicemail greeting should say and practice it a few times before you record it. It will be well worth it in the end!
Before you officially pick a greeting, why not practice on making your voice even and understandable? I know that my voice rises when I speak on the phone, and I tend to speak faster, so I practice in the mirror to slow down my voice and make sure that I am speaking as naturally as I can.