ScreenOFF SGS2 (com.bestapps.screenoff) on Google Play
**** ROOT REQUIRED **** TESTED ON SAMSUNG GALAXY S2 ***This application just simulates the button press ON/OFF of Samsung galaxy S2. I have tested with 4.0.4 and 4.1.2 and everything works fine.When you press the icon the Phone shutdown. You can also use gestures with Go Launcher and.For example when you slide on the menu button then the screen turns off.I made this because all the other programs I used, after upgrading to 4.0.4, did not work well. Some of them turn on screen again and some others make a flash before turning off.