My tv provider log in isn’t working and says wrong user or password.

Hello and welcome to Apple Support Communities, SpideyFlny.

If we understand your post correctly, your TV provider log in credentials are being rejected on your iPhone but work on other devices. We’d like to help.

The article you were viewing has some great information about signing in:

Sign in with your TV provider on your iPhone, iPad, or iPod touch

Keep in mind that if you've recently changed your password your iPhone could be using an outdated saved password.

If you're still unable to sign in we'd recommend reaching out to your TV provider.

Thanks for using the Apple Support Communities.