It's very easy to unlock your ANDROID pattern lock codes with your gmail account that linked with your android phones,but if you forget your email and password you can try this method.Usually known as hard reset code,(your internal storage data will be lost/reset to factory default state).
Sometime this condition also can be caused by attempted to many wrong pattern,or because you forgot the pattern than forgot your email that needed to unlock your phones.
This action cost you NO MONEY alias FREE.
Your phone software condition will be fresh like first time you use it.
You will losing all your data on the phone storage location.
other brands will be added soon.