Hi there, I'm having problem with my Samsung Galaxy S II (GT- I9100). The increase volume button is not working properly. Furthermore, when open any random software i.e games, the volume/sound will be set maximum automatically and can't turn down even pressing the decrease volume button. Even if i set the volume to silent first before run a game, the volume will automatically set to maximum after i run the game. If i want to increase volume i had to increase it at setting menu. This also effect when i want to zoom in to take a pic..fuuuu..Is there any problem with the hardware or the operating system itself? What should i do? How to counter this problem? Thanks for your attention and i'm looking forward to hear from you. Thank you.