Besides creating an audio file in the right format (Adaptive Multi-Rate), you also need to trick the iPhone to upload your new greeting to the AT&T servers:
I have the same problem. I’ve also worked with the support line (via the chat option), and have been unsuccessful at getting it set up or enabled. “The voicemail box number is invalid…”, yet, if I call my number, I can leave a voicemail, but have no way to go in and retrieve it.
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Your voicemail service is usually controlled by your mobile carrier, therefore, the most reliable way to turn off your voicemail is to ask their support team to disable it:
If you've forgotten your retrieval number, call 800-244-1111 to get it. Alternately, the number was included in the welcome letter you received when you signed up for voicemail service.
Website: https://rdtk.net/software/how-to-modify-your-skype-voicemail-message-message/
Repeat steps 2-3 to check your voicemail. Feel free to send us your questions, suggestions and problems you’ve encountered while using your Android phone. We support every Android device that is
How To Record A Custom Voicemail Greeting On Android. You can record a custom voicemail greeting right from the Line2 app by tapping on the three dots menu icon (or menu button, depending on your device), then Settings > Call Handling > Greetings: Press Stop once you've finished recording your greeting. Click Preview to listen to the greeting
Now, it’s the time for a tutorial on how to change voicemail greeting on Android. Basically, there are two methods to get it done, depending on your system operation. If you’re using Android Marshmallow, here’s what you need to do:
By default beginning April 2017, voicemail transcription is available for all Phone System in Microsoft 365 users. When you receive a voicemail, the message will be transcribed in the body of the voicemail email you receive in your mailbox. If you do not want to have transcription for your messages, ask your admin to disable it for you.
Website: https://info.montgomerycollege.edu/_documents/offices/information-technology/services/quick_ref_guide_voicemail.pdf
Besides, to update Carrier settings, go to Settings > General > About. If any carrier update is available, the pop-up will ask you to update it.
Voicemail. Find out how to set up your voicemail, check messages, and more for your AT&T Home Phone. Learn how to set up and check Unified Messaging voicemail. Get help with voicemail, including setting it up, and recording a greeting.
The number you press to delete a voicemail depends on your mobile carrier. To confirm the number, access the voicemail and listen to the automated message.
4 - Give your audio file a nickname, tag (optional) and select “Mailbox Greeting” from the Type drop down.
Sending a Message. – Lift Handset. – Press Express Msg key or Feature 980. – Enter the mailbox number to send the message to. – To leave your message, press OK or 2. – Record your message at the tone. – To end recording, press OK or #. – To send your message, press SEND or #. Checking Voicemail from an Outside Line.
Record your greeting. Under Voice mail, select Greetings. Select the type of greeting you want to record. Select Call me to play or record the selected greeting. Enter your phone number and select Dial. Follow the instructions in the recorded message to record your greeting…
Now select “Greeting” in the upper left of the screen. Tap “Custom” and then “Record” to record your personalized voicemail greeting.