12. Passcodes can be words instead of numbers
That’s right, you can use texts and words for your passcodes instead of coming up with a random number (birthdates are too easy to figure out). In order to do that, at first, go to settings, then general, then click on the passcode lock. From there, turn off the setting that says simple passcode. You will get a QWERTY keypad to let change your passcode. The next time you try to unlock your phone, the full qwerty will appear.