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 ...

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.

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.

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.