Rtt mode

Greetings, RttTina.

I see that you'd like to turn off RTT calls on your iPhone 7, and I'm happy to help.

Make and receive RTT calls on your iPhone -- Go to Settings > General > Accessibility > RTT/TTY to turn that feature off.

Take care!

Thank you for trying that, RttTina. It's appreciated. Since you can't turn the feature off, I'd like for you to reinstall the operating system of your iPhone 7.

How to back up your iPhone, iPad, and iPod touch -- Please be sure to have a fresh backup to keep your personal information safe. In order to back up your Health data, the backup needs to be encrypted. iCloud does this automatically, but iTunes doesn't. If you'd like to use iTunes to back up your iPhone, refer to this article: About encrypted backups in iTunes

If you can't update or restore your iPhone, iPad, or iPod touch -- Even though the title of the article isn't specific to your issue, the section titled "Put your device in recovery mode and set it up again" will walk you through all the steps to reinstall the iOS software on your device. See if you're able to turn RTT off. Please let me know how that goes when you're able?

Cheers!