If your smartphone was ever lost or stolen, would you know what to do? Lock it remotely, call your carrier or use a tracking app. That’s a start. But you know what weapon most people sleep on? That ...

The IMEI (International Mobile Equipment Identity) number is a 15-digit unique identifier for all cell phones. It is used to identify the phone and the manufacturer and whether it is original or ...

The numbers on a credit card help identify the credit card network, the company that issued the card and the cardholder. Credit card numbers are either 15 or 16 digits, with each digit having its own ...

You’re at the checkout screen after an online shopping spree, ready to enter your credit card number. You type it in and instantly see a red error message ...