I use the Camera.rect to adjust my camera to keep render ratio is correct.
It works on the iPhone, iPad, Mac, but there is some garbage real-time rendered (ie. garbage image updated real-time with camera, not a static image which are not cleared.) outside the camera’s range on the HTC Flyer like this:
If you set the Game view in the editor to a wide ratio, what do you see at the edges? If it’s blank space (i.e. you see the camera’s clear color), then fill it by putting something there (a simple black box would work). AFAICT, many (all?) Android devices will use their own aspect ratio, regardless of what you set.
If there’s already something visible there, then it would be a different issue.
Put another camera with a lower depth in the scene, set its background to black, and its culling mask to Nothing… that should replace the random noise with black bars.