Why is my visual voicemail currently unavailable

Shivi21 Said:

"Why is my visual voicemail currently unavailable: Even after turning off airplane mode nothing helped"

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Troubleshooting Visual Voicemail:

Visit the following link. It has a few thoughts, some you have already tried. 

Try the Following:

1. Go Here: Set Up Visual Voicemail on your iPhone - Apple Support
2. Scroll to: Get help with Visual Voicemail
3. Proceed from here as necessary