If you have an iPhone, you probably have a passcode to prevent strangers from accessing it without your permission. Most of these codes are only 4 to 6 digits long. That length might seem good enough, but it’s guessable by specialized GrayKey devices. To stay on the safe side, use a 9- to 12-digit password […]

What if you left your phone behind in a public place? Without a passcode on the lock screen, its contents would be fully accessible to anyone who had it. Configure a passcode, along with other even more secure options such as a fingerprint or facial recognition scan, if available on your device.