Swedens I believe largest operators 3 and Telia has unlimited or a large amount of data that doesn't count towards the usual data limits when using specially selected services such as Spotify and Facebook.
Telia also attached a condition that you had to promise to be nice on the internet and not practice "näthat"(net hate). Not joking either, they were then very unresponsive to criticism and questioning of their stance on net neutrality.
