To change your restrictions passcode on an iPhone, you'll need to go into your Settings. Where you go from there depends on ...
To turn off the password on your iPhone, you'll need to open the "Passcode" menu in your Settings app.
1. Tap Settings on your iPhone. 2. Tap Face ID & Passcode. You might have to enter your Passcode here to continue. 3. Tap Stolen Device Protection. 4. In the new menu, toggle on Stolen Device ...