Here's the California law: https://en.wikipedia.org/wiki/California_Internet_Consumer_P.... T-Mobile Binge On is zero-rating. T-Mobile's claim is that they aren't getting paid for it, and that any video provider can participate, so they aren't only zero-rating "some content in a category". It sounds like that second part isn't true, so they are probably violating the law but nobody is being harmed so nobody has sued.

I agree that allowing any form of zero-rating is not full net neutrality because it isn't treating all packets the same, but I don't think it's fair to say that therefore there is no net neutrality in California. It's a very strong and effective law and gets like 95% of the way to full "dumb pipe" net neutrality.