Stop using your 4-digit iPhone passcode in public. Do this instead
Christina Darby/ZDNET While a six-digit passcode is harder to memorize than a four-digit one, I'd recommend taking things a step further by using an alphanumeric (lettered code) password. Select "Passcode options" and choose "Custom Alphanumeric Code." For the best security, pick a word or phrase that is hard to remember at first glance.Also: Change this one iPhone setting to foil thieves from stealing your phone and selling itIt might be a pain to type out "imsmarterthanathief" every time you go to check a…