Don't worry here is a simple solution to unlock it.
Warning : your internal data (message, contact, notes etc.) may loss. try it at your own risk.
- Switch off you android phone and then wait for second to switched of it.
- then first click Up Volume Key and hold it.
- Click on home button and hold it.
- Press the power button and after is started just release it.
- Then you can see you enter in the secret android menu you never see it before.
- Click on home button for up and down in the menu.
- Then just go to third option named as DELETE ALL USER DATA.
- The phone will be start without pattern.
- Enjoy