Stretching the whole screen

Unity Engine
1

I want my game to fit every resolution, currently it fits my phone which has the resolution of 1920x1080
but when i switch to a 3120 x 1440 resolution, the game is not stretching to the whole screen and thats the effect im looking, i searched for different solutions but all of them include black bars on the side.
i have also used a code which allows me to keep the definition as it is but it cuts the height of the level.
i want to keep the height and the width as they are but i cant do that without stretching.

can someone share with me the code of stretching the game to fit the screen?

2

@Blueskai_1 You need to have a notion of a native resolution at which you designed the game, and then scale your camera according to whether the current device aspect ration is bigger or smaller than then native resolution you design the game.

This might get you started in the right direction:
http://www.thegamecontriver.com/2015/06/unity-2d-scale-resize-camera-size-resolution.html

(P.S. I’m used to NGUI which had a similar notion.
If you were using a Canvas, you could also use Redirecting to latest version of com.unity.ugui)