By Conner Carey on Tue, 10/13/2015
With iOS 9, Apple introduced six-digit passcodes for higher security. It may seem like a small change but the additional two digits changes the possible combinations from 10,000 to a million. The change is automatic on new devices and available with the iOS 9 upgrade. Whether you prefer to stick with a four-digit passcode or want to take advantage of the upgrade, here’s how to switch.