Most mobile browsers have a resolution restriction of 4k by 4k for the texture. So you would probably have a better experience with setting your quality to "Normal" when going for.
Also if you are using GearVR I recommend loading their viewer settings in "Headset" using the cogwheel⚙ menu in VR mode on your Android.
Here are some example configs for the GearVR:
I'm sure you will be a lot more of those QR codes on the web 👍