Need original finger print .the main point is need good finger print. If u don't believe that u test to without fingerprint to installing iOS update .from u r good iPhone 6 & 6 plus, u will know this error,after u installing again with fingerprint u can install finish.iphone 5 s is no problem.he he he now I know how to pass this error ,buy new one iphone Update: This problem is very easy to think ,now Apple is they want to fix their iPhone & they want to take a lot of money from customers.that is fact.