Users often don’t invest enough time into their messages, resulting in incomplete, unprofessional, or otherwise under-whelming greetings. Sure, crafting a greeting doesn’t sound all that complicated; however, there are a number of pitfalls users can fall into—i.e. informality, terseness, sincerity, lack of direction, and more. While none of these sound too catastrophic, they are often interrelated. As such, they tend to worsen any problem. For example, humor can cause informality, worsen ambiguity, and weaken sincerity. That being said, users should strive to avoid ALL these pitfalls.
When you speak into your phone, do not speak directly into the mouthpiece. If you do, you will likely create “popping” and “hissing” noises when you pronounce words that have the letters “p” or “s” in them. Be sure to speak across the mouthpiece and not directly into it.

Will prospects even listen to my message, or will it just be deleted as soon as it's received? If my message is heard, what are my chances of getting a response? Shouldn't I just focus on email and forget sales voicemails altogether?
Hello, you have reached the food delivery services of X. I am currently speaking to a customer and will not be able to take your call now. If you want some urgent delivery of food items, you can call our other number Y and place your order. Otherwise, kindly leave your details like your name, contact number and your order details so that I can get back to you for confirmation. Thanks for your cooperation.