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 that allows me to change the FOV of the camera in-game, it works well in the editor but when I play it on my Android phone it doesn’t work anymore. Did anyone get the same problems? Thanks for the help!

here is the code

using UnityEngine;
using System.Collections;

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;
	}
}

public void ZoomIn()
{
	caml.fieldOfView -= zoomSpeed/8;
	if (caml.fieldOfView < minZoomFOV)
	{
		caml.fieldOfView = minZoomFOV;
	}
}

}

i have the same problem with 2017.3