As tempting as it might be, avoid using 0000 as your four-digit PIN code. Same goes for 1010, 1111, 1122, and 1212, which comprises the top five worst PIN codes, according to a list compiled by ...

ALBUQUERQUE, N.M. (WHAT THE TECH?) — You probably have at least one simple four-digit code memorized. We use them for a lot of important things like debit cards and phones. But some pin-codes are more ...

If you have an Apple or an Android phone—and you probably do—you have the option of locking your phone using a PIN code. With most of these phones, you can choose a four-digit PIN or a six-digit PIN.