This is regularly driving me nuts. Every once in a while, my phone freezes for whatever reason. I press and hold the power button to shut if off. Now comes the part that's giving me trouble.
If I just press the power button, nothing happens.
If I press and hold the power button, at some point a picture of a battery appears. It will disappear again after a while (probably because I'm still holding the power button and shutting the phone back off)
If I press and hold the power button and release it when the battery image appears, the image will stay and indicate that the battery is being loaded.
If I press and hold the power button for just the right amount of time, the Galaxy S2 logo appears and my phone boots.
So, usually I find myself going through this cycle a couple of times until I finally get my phone booted. What am I doing wrong?