A 4-digit iPhone passcode is about as insecure as it gets, and this black box can figure yours out in just a few days. So it's time to consider better security.

iPhones are chock full of critical personal and business information -- you should secure it with the same vigor as your laptop.

An iPhone user has found a trivial way to bypass the four-digit passcode lock on fully patched iPhone (iOS 4.1) devices. Written by Ryan Naraine, Contributor Oct. 26, 2010 at 1:46 a.m. PT ...

Here's a video of the tool, called XRY, in action against a passcode-protected iPhone 4: Note : iPhone 4S and iPad 2/3 are not supported. XRY works by first jailbreaking the handset.

• Simple Passcode. As noted above, the iPhone 4 relies on a simple four-digit numeric passcode by default. For better security, turn off the Simple Passcode option.

Want a little stronger security lock-down for your iPhone than what the 4-digit PIN offers? Weblog 9 to 5 Mac details how to enable a more secure alpha-numeric passcode on your device with a few ...

iPhone users, particularly those who use iPhones running on iOS 9 and newer, know that Apple has decided to use six-digit passcodes in lieu of the four-digit security passcode on iOS 8 and older.

You probably know that your iPhone features a simple passcode functionality that secures the device by requiring, by default, a 4-digit PIN to unlock your phone. But as you also probably know, a 4 ...

By default, Apple suggests you use a 6-digit numerical passcode. If you want to do that, enter it now. But if you don’t want to enter a 6-digit passcode, tap the blue Passcode Options link above the ...