Enter a four-digit passcode, verify it, and you’re there: you’re back to the happy days of four-digit passcodes. Read next: How to remove or bypass a forgotten iPhone passcode ...

How easy would it be for a thief to guess your four-digit PIN? If he were forced to guess randomly, his odds of getting the correct number would be one in 10,000—or, if he has three tries, one ...

You can't use it to unlock an iPhone if you don't know the Apple ID credentials used to sign into it. You can unlock your iPhone as long as you remember the Apple ID/passcode combination.

Depending on the number combination of the four-digit pin protecting an iPhone, the IP-BOX will go through all possible combinations from 0000 up to 9999.

With a four digit PIN, there are a possible 10,000 combinations. But with a six digit code, there are 1 million possible combos, making it a lot tougher for someone to crack your security code.

“People put themselves at risk by having weak passwords and PIN codes and often do not fully understand the threat until they are compromised,” Moore added.