How Thieves Unlock Passcodes on Stolen iPhones (And How to Protect Yourself Against It)
1. Using Brute Force to Bypass the iPhone Lock Screen
Aside from the 10 common passcodes above, your chances can exponentially increase if you know the owner of the iPhone well.
Many people use 4-digit pins that they're familiar with: birthdays, anniversaries, addresses, the last 4 of their social security numbers, and even the last 4 digits of their own phone number. iPhone users unlock their cell phones dozens of times a day, making a simple and memorable passcode beneficial.
Add to that oily finger smudges on the screen and there's a pretty good chance you'll get passed the lock screen security.
You have 6 tries to access the phone before you'll see the "disabled" warning, and then a few more before the phone is completely disable, so that gives plenty of chances for a good brute-forcer to gain access.
2. Using Siri to Bypass the iPhone Lock Screen
You can use Siri to bypass any code on the iPhone 4S, 5, 5C, or 5S (if Touch ID is disable), but only to a certain extent, and only if the user has allowed Siri access when the phone is locked.
If so, you can just press down on the Home button and ask Siri to make a phone call, send a text, and look through notes. Simple stuff. You can't use Siri for things like looking through email, contacts, or the internet.
3. Completely Resetting the iPhone with iTunes
Resetting your iPhone can bypass the passcode, but will delete everything on the phone. This can come in handy if you forget your passcode and have everything backed up on your iTunes. So, if you get a message like this when connecting the device to iTunes...
You'll need to restore your iPhone back to factory settings:
- Turn off your iPhone.
- Press and hold the Home button, and while holding the Home button in, hurry up and connect your iPhone to your computer using the USB cord.
- Continuing holding the Home button until the "Connect to iTunes" screen pops up.
- iTunes will give you the recovery mode alert.
- Click "OK" and restore the device.
This will take off the passcode, but will delete everything on the phone. Make sure to back up your iPhone at least once beforehand, or it will wipe to factory settings.
4. Tricking iCloud with a Fake Server
An anonymous hacker by the name of AquaXetine found an exploit in Apple's iCloud system that lets anyone unlock a lost or stolen iPhone running iOS 7 or above, and Apple has yet to fix it.
This hack, available at the doulCi website (iCloud (almost) spelled backwards), appears to change your DNS for the connection to iCloud so their server can intercept the Activation Lock request, and then responds with the proper message to unlock the device.
So far, the hackers claim that over 15,000 devices have been unlocked using this technique.
5. Using Passcode-Hacking Apps
You can unlock an older iPhone using redsn0w, which also jailbreaks the device without deleting anything. This article has a video that shows how to install redsn0w on any iPhone still using iOS 5, while this one will show you how to do it on iOS 6 devices. It bypasses the code and doesn't delete any of the information stored on the iPhone. This could potentially also work with the evasi0n jailbreak for iOS 7 devices, as well.
You can also use a program called Gecko iPhone Kit (for iOS 5), which can be downloaded here, but most devices are using at least iOS 6 by now. This will actually give you the code and doesn't jailbreak or delete anything from the iPhone. Below is a video tutorial of this process.
Source : http://ios.wonderhowto.com/how-to/thieves-unlock-passcodes-stolen-iphones-and-protect-yourself-against-it-0139559/

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