Make sure that you have the latest version of iOS. Check for a carrier-bundle update: Go to Settings > General > About. If an update is available, a message will ask you to update. To check your cellular network connection, try to call someone.
Hopefully, you found the interesting tips over here, to set different voicemail greetings messages on your iPhone that using Carrier like Verizon, AT&T, Sprint, T-Mobile and any other.
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The problem could be a result of a virus or software bug on your phone. Before resetting your phone back to its factory settings, back up all of the information stored on it to another device, so that you can put it back onto your phone after the reset.
To activate Visual Voicemail, dial 1217 from your iPhone and a recorded message will confirm it has been switched on. When a message is left in your voicemail mailbox, you'll see a notification against the ‘Phone’ widget on your iPhone. When you activate Visual Voicemail, your current personal greeting will carry over.
Website: https://support.google.com/voice/answer/115069?hl=en&co=GENIE.Platform=Android
As with most technology and applications, experiencing glitches at times is normal. We may not be able to pinpoint the cause of why you are not able to delete your voicemail messages, but here are three things you could try via your Android phone to solve the problem:
For a downloadable Quick Reference Guide to the voicemail phone menu, click here.
If you know your PIN and simply want to change it, dial *98 from your home phone and enter your PIN. Then, from the main menu, do the following: For security options, press 3 To change your PIN, press 1 Enter your new PIN (4-15 digits) To confirm, enter your new PIN again
3. Mobile Wireless: Press and hold the “1” button on the dialer screen of your T-Mobile device. This command automatically dials into the T-Mobile voicemail system.
Tired of telemarketers on your iPhone? Learn how to block callers on your iPhone so that you don’t have to deal with any calls from them.
Website: https://toolbox.iskysoft.com/iphone-recovery/iphone-asks-for-voicemail-password.html
From the Android Mobile App: Click the More button at the top left of the mobile app. Select Voicemail. Click Folder with Music Icon located at the top of the mobile app. Click the Record button, give the recording a title, and click OK. The system will call your extension. Answer the call and follow the prompts to record your new greeting.
Procedure. Access the voicemail system: From your own extension: Dial 555 and enter your voicemail password, followed by the # key. From another extension in your system: Dial 500, enter your extension number, then enter your voicemail password, followed by the # key. Press the * key to enter the Main Menu.Note: If you have no saved voicemail messages, …
To close the Phone app, begin by double-pressing the Home button. This will open the App Switcher, which will display all the apps you currently have open on your iPhone. Use your finger to swipe up on the Phone app. You’ll know the Phone app is closed when it no longer appears in the App Switcher.
Website: https://support.youmail.com/hc/en-us/articles/203444993-Assign-or-Change-Greetings-on-the-Android-App
View your Access voicemail messages for information on how to better manage your voicemail. Check out Troubleshoot Voicemail for solutions to some of the most frequent voicemail issues.
3. Settings menu. To access your voicemail setting menu, press and hold the 1 key or dial 123 on your device dial pad. If this doesn't work, dial 1-805-637-7249, enter your 10 digit number and while the voicemail greeting is playing, press * (star key) and enter the password.