When you call 321 from your mobile, you’ll be asked to type the PIN into your phone and record your name and personal greeting (that’s what people will hear when they call through and can’t get back to you, so make it catchy).Once your greeting has been set, we’d recommend changing your Voicemail PIN to something more personal so you can easily access your Voicemail settings in the future. You can do this through the user options area of 321 (that’s option number 8 on the main menu).Your PIN can be any series of numbers between 4 & 9 digits, provided they are not sequential (e.g. 5678) or aren't a series of repeated numbers (e.g. 111).
You can also upload an unavailable greeting using the OnSIP app. After logging in, click on the Voicemail Settings gear icon at the far right. Make sure that the Custom Greeting is toggled to "on." You will then see an option to upload a .wav file of your choice. This recording will serve as your unavailable message.

When your small business is closed, ensure that your callers know that! If appropriate, you might want to reiterate your business hours to manage callback expectations.
No one enjoys listening to long, drawn-out voice messages. When considering what to say, identify one main point and discard the rest.