After creating, the Voicemail Greeting, you can test it by calling to your number from another phone, and see if it is playing correctly or not. Open the Phone App. On the lower screen, tap on the Voicemail option. Select Custom, with this option, you can record the personal voicemail greeting on the iPhone. Tap Record, to start recording the voicemail greeting message on the iPhone. Greeting samples are given in this article below, Once you are done with recording, tap Play to listen. Lastly, if everything is alright, and custom voicemail recording is perfect, then tap Save.
Typically, a good business voicemail greeting should comprise the following elements: A warm greeting. Your name, the name of your company and department name. Make an apology for being unable to take the call. Ask the caller to leave a message. Let the caller know when to expect a return call.

Leave a specific request. What do you want your listener to do? Sure, you want them to call you back, but why? To answer a question? To set up an appointment? People will appreciate it if you give them specific actions for their call back. That way they’ll know they won’t be wasting a lot of time on the call back trying to figure out what you want.
In a concise fashion, you should relate the hours your business functions, and note any potential conflicts such as holidays or business closures. Use an auto attendant if you have more than one menu option for the customer, such as a voicemail box and an emergency support line.