After a few attempts the OS would rate-limit guesses to prevent exactly that. On some iOS versions it is possible to override this mechanism by cutting power at

After a few attempts the OS would rate-limit guesses to prevent exactly that. On some iOS versions it is possible to override this mechanism by cutting power at the right moment[1] but this exploit has been patched for a while and I doubt this device is vulnerable. [1] http://observer.com/2015/03/watch-this-little-machine-brute-force-its-way-through-an-iphone-lock-screen/ http://observer.com/2015/03/watch-this-little-machine-brute-...