Greetings pennyfromport washington,Thank you for using Apple Support Communities. I see that your visual voicemail is unavailable, and you cannot call voicemail. Visual voicemail is a great new feature that I use a lot. So, I can understand wanting to get this resolved as quickly as possible. Please see the article Visual Voicemail on your iPhone, and make sure that Visual Voicemail is set up, and that your carrier supports this feature, specifically these sections: Set up Visual Voicemail
If your carrier supports Visual Voicemail, you can set it up:
- Tap the Phone app, then tap the Voicemail tab.
- Tap Set Up Now.

- Create a voicemail password, then tap Done.
- Enter your password again to confirm it, then tap Done.
- Select Custom or Default. If you choose Custom, you can record a new greeting.

- Tap Done.
Transfer your existing voicemail:
- Tap the Phone app, then tap the Voicemail tab.
- Tap Set Up Now.
- Enter your password,* then tap done.
- Record a custom greeting or use the default greeting, then tap Save.
If you forget your voicemail password, there's no way to reset it from your iPhone. You need to contact your carrier to reset your password. If you insert a new SIM card, you might lose the voicemails that you saved on your iPhone.

Get help with Visual Voicemail
If you can't set up Visual Voicemail, make sure that your carrier supports this feature.
If you need help, try these steps. Check your Visual Voicemail after each step:
- Try to call someone to check your cellular network connection.
- Make sure that you set up your voicemail. To check, dial your phone number from your iPhone.
- Call your iPhone from another phone and try to leave yourself a voicemail.
- Go to Settings > General > Reset and tap Reset Network Settings.

- Contact your carrier and make sure that you have the voicemail feature on your plan.
Then, I would also advise to give your iPhone a fresh restart and see if that helps when you try to call your voicemail. The following article will help:Restart your iPhone, iPad, or iPod touch
Have a great day!