You can use a little trick: 

  MPMusicPlayerController* musicPlayer = [MPMusicPlayerController iPodMusicPlayer];
  musicPlayer.volume = 1; // device volume will be changed to maximum value


iOS: Change Device Volume
How can I figure out what is my tablet's lcd screen density.

It is a cheapy one with no official site...

Is there any settings option I could check to see the display resolution configurations?
Is there any other way for it?
