Weird result with camera scaling

I'm designing this game based on a 800x600 resolution screen and this is what it looks like:




When I select a different resolution, this is the result:



I don't want to have that empty space, so I changed the width of my Camera Viewport Rect with this code:

float idealAspect = 800f / 600f;
float aspect = (idealAspect / ((float)Screen.width / Screen.height));
Camera.main.rect = new Rect (0, 0, aspect, 1);

It works fine when running the game inside Unity, but when I run directly on my phone (Moto G 2nd gen.), this is the result:



Any idea on how to fix this?

Thanks.

 

anyone?

 

well I'm still lost so lol.