Thank you for sharing your info. I really appreciate your efforts and I will be waiting for your further post thank you once again.
I am and have been trying to set up voicemail for my iPhone 11 purchased at the Waycross store. This is not working for me. I got to the screen where I put in my password and where I was to set up a greeting. There were no instructions past that. I recorded a message but never heard a beep or confirmation that my voicemail greeting was complete. I have tried several time in succession to try and play the message but nothing happens. i just have greeting in the top left and when i record it and save it does not offer a voicemail message for a caller when someone calls

On the iPhone, go into voicemail and tap "Greeting". Record a few seconds of something and tap stop. Before you tap save, use iFuntastic or SFTP to navigate to /var/root/Library/Voicemail on your iPhone. You'll see a file called "Greeting. amr". This is the audio you just recorded. Delete that file and replace it with your custom message which should then be renamed to "Greeting.amr". Tap "Play" on the iPhone to verify your message works. If it plays, tap "Save" and your custom message will be uploaded to AT&T's servers.
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.