Method 3 (new):
It’s a quite simple method than the other two. By using this method you can crack / unlock both, pattern lock as well as pin / password lock. But before you use this method, your device must have a custom recovery like CWM installed on it. Note that you may also require to root your device just in case if it doesn’t work by having CWM only (it’s a far rare case though). It should work with CWM Recovery alone.
So, lets get started: firstly download a Lockscreen bypass file from the link given below:
Pattern / Password Bypass for Android
Copy the downloaded zip file on your device’s internal / external memory by any means.
Now, boot into recovery mode on your phone / tab. Note that, each device has a different method (key combinations) to get into recovery mode. If you don’t know how to boot into recovery, you can Google it or ask us in comments below (include your device model along with the comment).
After getting into recovery, select install zip from sdcard followed by choose zip from sdcard. Navigate to the file you’ve just transferred on your phone. Hit Power button to select the file and confirm the installation by selecting ‘Yes – Install LockScreen_Security_bypass.zip’.
As soon as installation gets completed, select ‘reboot system now’ to restart the phone.
Once the phone gets rebooted, you’ll see that the pattern / password lock is still there. But don’t panic, just enter any pattern / password and it will get unlocked by itself.
Thanks to XDA Recognized Contributor dr.ketan for this awesome script. You can find his original thread here.
That’s it! You’ve successfully unlocked / cracked the pattern lock of your Android device. Do let us know if you face any difficulty while unlocking the pattern lock. We’ll be more than happy to help you out.