Problem on phones(glitch) due to lowering of viewport Rect (W) of ortho cam to 0.8

Hi.I have viewport Rect (W) of my orthographic camera set to 0.8.basically it works all fine on unity. However when i built it for android and check on phones, On right side of the screen it creates duplicate of little part of my scene which looks totally wierd.Please help me fix this. will be much appreciated. I know it is due to camera viewport rect lower value.I also understand that as I have lowered value, 0.2 of camera W is empty. But how do i fix this? I cant keep my Main Camera viewport Rect to 1...That will just mess up my scene.