Nobody cares that you&#x27;re using an alphanumeric passcode on your iPhone.<p>Some corps require or strongly encourage it. My employer does.<p>And most parents I know use alphanumeric to keep their kids from wiping their phones and iPads just by tapping the numbers. (A four digit number code auto-submits on the 4th tap, so all it takes is 40 toddler taps. An alphanumeric code can be any length and won&#x27;t submit unless the actual submit button is tapped.)