enable VR on mobile

Riffing off a question from @KristofferH

I have a mobile app and there is a button in the corner that I want to trigger a VR mode
VRSettings.enabled

so you can put into cardboard (on IOs or Android)

in VR there is a button on the floor to go back to touchscreen mode

VRSettings.disabled

Doesn’t work
Does anyone have experience ?

Thanks

~be

Something like This doesn’t work

    void OnMouseDown()
    {
        //if VR mode is off turn it on- if it is on turn it off
        if (VRSettings.disabled)
        {
            VRSettings.enabled;
        }
        else if (VRSettings.enabled)
        {
            VRSettings.disabled;
        }


    }

Thanks !

~be