how to change tv provider iphone 14 when it's blacked out

Hi rlgngsg,

You started from a great resource: Sign in with your TV provider on your iPhone, iPad, or iPod touch

As mentioned in the article: "Availability of signing in with your TV provider may vary by country or region."

If you are currently in a supported country or region be sure the following steps were attempted:

"Change or sign out of your TV provider

If you change TV providers, you can remove your current TV provider account information or set up a different one:

1. On your iPhone, iPad, or iPod touch, open the Settings app.
2. Tap TV Provider.
3. Tap Remove TV Provider or Sign Out.
4. In the pop-up that appears, tap again to confirm.
5. Choose your new TV provider from the list, then follow the steps to sign in."

If you're still unable to change the details, check your restrictions with the help of the article here to ensure you can allow changes on your device: Use parental controls on your child's iPhone, iPad, and iPod touch - Apple Support

Cheers.