I have recently got a new iPhone, so I am now on iOS 11. When I set my passcode, it set it up so that my passcode can be used to change my Apple ID password. This is terrible for security and I want to remove this ability. It seems you only need the passcode to set it up, which is something I occasionally share for a friend to use my phone, but even without that, can be seen when using. My Apple ID is a whole different level of protection away. I want to disable this passcode capability, but cannot find a way. Can anyone help please?