Depending on which Android phone model you are using, you can dial the carrier code and directly stop the Voicemail service.
Website: https://www.verizon.com/support/residential/homephone/calling-features/voicemail
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Website: https://www.reddit.com/r/iphone/comments/3xuac5/cant_change_voicemail_greeting/
Step 2. Press and hold “1” key on your keypad. You will get a message that you have no voicemail number stored on the card.
If the problem is with your phone, the factory reset has a good chance of solving it. If not, contact your mobile service provider, to carry out some troubleshooting to help resolve the problem from their end.
To block from a text: Open a text from the contact that you want to block tap More options People and options Block [number] Block.To block from a call or voicemail: Open a call or voicemail from the contact that you want to block tap More options Block [number] Block. In the “Account” tab, under “Phone settings,” tap Voicemail. Turn on “Call to listen.” Enter your PIN and tap Save.
2. Select the Keypad tab, then the Visual Voicemail icon from the drop-down menu.
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Once you’ve set up your voicemail, you’ll be able to turn off your phone whenever you want. There are, however, alternative means by which you can keep in touch. What is the procedure for resetting voicemail on a Samsung device? Modify the greetingTo access the Apps menu from any Home screen, select it from the drop-down menu.Select Visual Voicemail from the drop-down menu.Select the Greetings tab from the drop-down menu. To switch to an existing greeting, simply tap the greeting you want to use.
5. US Cellular: Dial *86 (*VM) from your US Cellular device, then press “Call.” This command will dial you into the voicemail system’s main menu. Press “3” to access the Greetings menu.
The voicemail section allows you to change your personal voicemail message. Until you set one, anyone getting your voicemail will hear the standard Phone.com voicemail message. It’s always a good idea to set a personal voicemail so your callers know that they reached you. Try and give them an idea of when you’ll get back to them. You have 3
Tap Record a new greeting. Note: If necessary, delete an existing greeting (limit of 2 greetings) to make room for the new greeting: Tap the Menu key, tap Delete greetings, tap the check box next to the desired greeting, and then tap Delete.
On Android devices above Android 5 (Lollipop), open the Phone app. Then, press and hold "1" to call your voicemail. Now, enter your PIN and press "#". Press "*" for the menu. Press "4" to change settings. Press "1" to change your greeting. Make sure to follow all the instructions.
Website: https://apple.stackexchange.com/questions/238133/visual-voicemail-wont-let-me-play-back-or-adjust-greeting
FROM YOUR WIRELESS: Press and hold the 1 key to access the voicemail system. When you hear the recorded message, press the # key to bring you to the system menu. Press 4, for the Personal Options followed by 2 for Personal Greeting. Follow the prompts to record, listen to, re-record and save your greeting.
4. Toggle Cellular Service on and off. You can turn off and then turn on Cellular Service from Settings or Control Center. Launch Settings → Cellular → Toggle off Cellular Data → After 30 seconds, toggle it back on.
Just upgraded to iOS 15? Here are the first new options you should set up to get the most out of the update.