Recording professional voicemail greetings is easy but many people find it to be akin to public speaking, and are therefore apprehensive about starting. First of all, lets acknowledge the elephant in the room and just say that nobody in the history of the world enjoys the sound of their voices being played back to them. Once you can accept that, getting a professional voicemail greeting or Auto Attendant menu recorded will be a lot easier. To help you get the right tone and tenor of what you’re trying to communicate over you business voicemail, we’ve put together this handy list of resources for you.
You can customize each greeting for each phone number within your OpenPhone account. In addition, you can change it as often as you need.

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.
Take the time to listen to calls, call back if necessary, use your cell phone when you’re out of town, and take care of anything actionable listed in the messages instead of watching your mailbox fill in. This kind of attention to detail can go a long way towards building a good reputation and image for the business. Good luck! Voicemail Perfect for Professionals that Manage Multiple Businesses