If you have a SIM card PIN enabled on your phone to access data on the SIM card, but you repeatedly enter it incorrectly, the SIM card may lock you out from further attempts. You can reset the SIM ...

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.

Guess how long it would take a computer to brute-force an 8-number password. The answer: instantly. That's according to Hive Systems' Password Table, which shows how shockingly quick passwords of ...

While setting up a lock screen PIN on your Android or iPhone, there's always the fear that you might forget it one day. That's especially true if you usually rely on quicker methods without a password ...

PUK is the code required to unlock a GSM SIM card that has disabled itself after an incorrect PIN code was entered 3-5 times in a row. If an incorrect PUK code is entered a certain number of times ...

There's nothing particularly difficult about cracking a smartphone's four-digit PIN code. All it takes is a pair of thumbs and enough persistence to try all 10,000 combinations. But hackers hoping to ...

If you have a passcode set up on your phone and SMS-based two-factor authentication set up on your smartphone plan, you might think you’re pretty secure from hackers. While you’re doing a lot better ...

In what appears to be a heinous oversight, Comcast set the default PIN code for all Xfinity Mobile customer accounts to "0000," opening the door to phone number hijacking and, in some cases, identity ...

Are you getting ready to switch from Comcast's Xfinity Mobile plan? Perhaps you found a better deal on a budget Android phone, or maybe the prices are pushing you. There's something important you need ...