REPORTS SAY IT DOESN'T WORK
Update 3 – Uploads May Still Count Against Drive Storage
We’re hearing reports that this trick was discovered by the team over at OpenGapps a few months back and was quietly patched by Google already. In that case, applying this trick will still result in uploaded photos to apply against your Google Drive storage (ie. it doesn’t work). We haven’t confirmed this ourselves, but if/when we do we will update the above tutorial.
Update 4 – Google Photos Unlimited Storage Not Working, Pixel Wallpapers Still Work
I have confirmed that photos uploaded in “original quality” using this trick still count against your Drive storage. My Drive shows that I uploaded 0.2GBs of photos and videos from yesterday. This means that the trick was patched, likely when it was discovered by the people over at OpenGapps. It’s strange that this trick somehow still triggers Google Photos into showing you the original quality onboarding message, though.
Thread will be updated to look nicer. Atm I was in a hurry to post this for everyone to use