Hi, you’ve reached the home of [name]. If you are calling to collect a student loan, gambling debt, or other obligation, please press 1 and hang up now. If you are selling any product or service, or requesting charitable donations, please press 2 and hang up now. Otherwise, press 3 and leave your message now. Pressing 3 is optional.
All that being said, as voicemail is still thing, and carriers do offer it with every account, iPhones support voicemail. Here’s what you need to know if you want to set it up.

Do they want to sit through an IVR menu that may or may not direct them to the right person? Do they know you’re a one-man/woman team and there’s no reason to sit through a menu? Skip the menu entirely and let them leave a message as quickly as possible. There’s no reason to add any additional steps or make your customers go through leaps and hurdles to leave a simple voicemail. When you identify what your customers’ pain points are, you make it much easier to determine what you want them to do to save everyone from the unnecessary stress.
We bought a Raspberry Pi 3 Model B with clear case and 2.5A power supply for $45 to host the service. Once that arrived, I attached the Pi to a monitor, keyboard and mouse that I already had. Using another computer, I downloaded the Raspian operating system to a microSD card which is need to boot up the Pi. You can purchase a bundle that includes a pre-loaded microSD card, but if you don’t do that, the Pi won’t boot, so you can’t use it to get the operating system.