Website: https://toolbox.iskysoft.com/iphone-recovery/change-voicemail-on-iphone.html#:~:text=How to Change Voicemail Greetings on iPhone 1,voicemail, you will see a "Set... See More.
2. You can record your own greeting or choose from a list of preset greetings. You have 30 seconds to record a special greeting for your friends and family.
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Website: https://forums.att.com/conversations/data-messaging-features-internet-tethering/accessing-voicemail-from-another-phone-since-phone-is-broken/5defd419bad5f2f6061d2374
Step 5. Tap “Stop” to end the recording. Then, tap “Save.” You can open your recordings in the top-right corner of the screen.
5. Please take notice of the green number that appears below the “Voicemail number.”
At present, you have to record your greeting by recording directly into the iPhone microphone -- the results of which are average, of course.
Website: https://us.community.samsung.com/t5/Galaxy-S-Phones/How-can-I-change-my-voicemail-language-back-to-English/td-p/1995664
6. Restart your iPhone to fix your voicemail not working. “Just turn it off and back on again.” You may have heard this as a joke, but it’s actually advantageous to regularly reboot your devices.
To set up a personal voicemail greeting on a Galaxy S10, open its Phone app and call your voicemail, then tap "3" to enter the settings.
How do I change my voicemail message from another location? Altering your Voice Mail Password, your Voice Mail Greeting, or your Voice Mail Call from a remote phone: Dial your Voice Mail Gain Access To Number. Enter your 10 digit telephone number. Enter your passcode. Press U (8) to go into User Choices, then: Press G (4) to change Welcoming.
Website: https://support.spectrumvoip.com/hc/en-us/articles/360024048493-How-do-I-change-my-voicemail-greeting
To pick the check box next to ‘Mark Default Greeting,’ tap the check box to the right of the check box.
When voicemail is not working on your iPhone, a lot of people assume that there’s a problem with their wireless carrier, so they immediately call Verizon, AT&T, T-Mobile, or another carrier’s customer support hotline. However, a lot of the time the problem is really caused by a software issue on the iPhone itself. Your iPhone isn’t downloading voicemails from your wireless carrier; or The Phone app on your iPhone isn’t working correctly
If you don't record a new greeting, callers hear the default greeting. To record a new greeting: Open the Google Voice app . At the top left, tap Menu Settings. In the Voicemail section, tap Voicemail greeting. Tap Record a greeting. Tap Record . Record your greeting and when you’re done, tap Stop . Choose what you want to do with the recording:
4. Listen to the options. On most voicemail systems, tap "2" to start the process to record a new greeting.
source: How do i change my greeting for my voicemail messages on my assurance wireless cell phone? ahammad1996 Level 1 (Contributor)
5. Using Visual Voicemail: Access your voicemails. As long as your carrier supports visual voicemail, you can access your voicemails by tapping the Voicemail button in the bottom right corner of the Phone app's screen.