"But net neutrality advocates are skeptical about T-Mobile’s openness. “We can’t be really sure unless we know exactly what these technical requirements are,” says Barbara van Schewick, a law professor at Stanford University. “What has been so awesome about the Internet is that if we come with any app, we don’t have to negotiate with anyone, including ISPs, to get it to the users equally.”
“I would describe it not as the beginning of the end for net neutrality,” says lawyer and net neutrality expert Marvin Ammori. “But likely it’s the beginning of a lawsuit against T-Mobile at the FCC to test the FCC’s net neutrality rules and nip this in the bud.”"