The first step - turn off your phone. In the future, pressing the button below will take you to a menu where you will need to select wipe data / factory reset (erase data, reset to factory settings). Navigate through the menu by using the volume buttons on the phone. All the data on the phone, and not only the graphical key will be deleted, i.e. he will come to the state in which you purchased it in a store.
If your phone model is not listed, you can still try - who knows, maybe it will work.
Samsung Galaxy S3 - click the addition of sound and the center button "Home". Press the power button and hold until the phone vibrates. Wait for the android logo and release all buttons. In the menu that appears, reset the phone to factory settings, which will unlock the phone.
Samsung Galaxy S2 - press and hold the "sound less", at this time, press and release the power button. From the menu you can select «Clear Storage» (clear the memory). By selecting this option, press and release the power button to confirm reset by pressing the "up the volume."
Samsung Galaxy Mini - press and hold the power button and the center button until a menu appears.
Samsung Galaxy S Plus - simultaneously press "up the volume" and the power button. Also in the mode of an emergency call can dial * 2767 * 3855 #.
Samsung Nexus - simultaneously press "up the volume" and the power button.
Samsung Galaxy Fit - simultaneously press the "Menu" and the power button. Or press "Home" and the power button.
Samsung Galaxy Ace Plus S7500 - simultaneously press the center button, power button, and both the volume button.
I hope this list you've found your Samsung phone and instructions enable you to successfully remove the unlock pattern to it. If not - try all of these options might menu will appear. You can also find a way to reset your phone to factory settings in the instructions and on the forums.