Creating a professional voicemail greeting isn’t complicated, but you need to keep a few things in mind to ensure success. The following tips will help: Be friendly and welcoming - let your company's personality shine!; Have a clear voice, speak at a slow to moderate pace, minimize background noise; Ensure the greeting is human and approachable; Keep the greeting short and informative; Ensure the greeting doesn’t sound robotic or unnatural; Show your gratitude for the call by saying thank you; Manage expectations by clearly stating when the client can expect a callback.
This topic describes how you can manage group voicemail greetings, including playing, downloading, and deleting greetings.

There are three default text messages you can send as responses to calls on your iPhone. If none of the default text message responses serve your purpose, you can change them. To customize the “Respond with Text” responses, tap “Settings” on the Home screen on …
Some phone systems require the recording to be on a mp3 or wav file, and some you just have to record the greeting right into your phone. This last way is likely one you have tried already. Use the link here to find a FREE voicemail greetings for business. These are scripts you can modify for your use.