Camera FOV is adjustable in editor but not in Android Phone build (Google VR 1.6 and Unity 5.6.1f1)

I found a C# script on how to adjust the FOV of the camera In-game, it works in the editor but when I build it and played it on my Android phone the script doesn't work anymore. Anyone having this problem? Here's the script

public class CameraZoom : MonoBehaviour { // public Camera caml; public float zoomSpeed = 20f; public float minZoomFOV = 10f; public float maxZoomFOV = 60f; public bool zoomedIn = false; //boolean that determines whether we are in zoomed in state or not void Update () { if (Input.GetButtonDown ("Fire3")) {//(Input.GetKeyDown("z"))//This function toggles zoom capabilities with the Z key. If it's zoomed in, it will zoom out

         zoomedIn = !zoomedIn;

     }

     if (zoomedIn == true) {

         caml.fieldOfView -= zoomSpeed/8;
         //Camera.main.fieldOfView -= zoomSpeed/8;
         if (caml.fieldOfView < minZoomFOV)
         {
             caml.fieldOfView = minZoomFOV;
         }

     }
     else
     {
         caml.fieldOfView = maxZoomFOV;
     }
 }
     

}