Being human automatically means we can not be perfect, No matter how we try there will always be a weak point. If you agree follow the tutorial if you do not then this tutorial is not for you.
Have you ever lock your Android device with lock pattern,Pin code or password code before or may be you just change any of it in a hurry to prevent a friend or sibling who knew your code from using your phone,because i sometimes do do that but unfortunately for you the next time you want to unlock your device, you do not get the code or unlock pattern right which sucks "right". Do not get mad or frustrated because i have bring to you method you need to unlock your device using google account.

Try the unlock pattern/Pin code/Password code FIVE times
If after the fifth time you have no luck getting it right, You will be locked out.
At the bottom of the screen, there apper an option that says "FORGET PASSWORD" click on it
You will be ask to sign into your google account, enter your login details for google account you register the device with and If correct you will be allowed to choose a new Pin,draw a new unlock pattern and also set a new password.
Congratulations, you have successfully unlock your device.


Read more: http://www.rasaqtech.com/2014/05/how-to-retrieve-your-unlock-patternpin.html#ixzz3AyasW1ND