Visual vvoicemail disappeared after ois update

To add to Michelle’s list, try restarting your phone—>Restart your iPhone - Apple Support

And note that Visual Voicemail requires that cellular data be turned on.

Hi there leilani233,

We understand Visual Voicemail isn't working as expected on your iPhone 7, and we'd like to share some steps that may help.

Check them out below:

• Make sure your iPhone is up to date: Update your iPhone, iPad, or iPod touch
• Check for any available carrier settings updates: Update your carrier settings on your iPhone or iPad
• Confirm you have an active cellular data connection.

Cheers!

You’re welcome. Your carrier doesn’t know about your Wi-Fi connection, so it needs cellular data to send the voicemail data to your phone. Picture texts (MMS) also require cellular data.