Not 100% sure. In argentina it looks like the law for net neutrality was passed in 2013. Free whatsapp being implemented sometime around 2017, but it must have been reverted shortly after possibly due to FSF lobbying, which was quite close to the government.
Radio and TV neutrality was a hot political topic at the time as well, the incumbent government was pro-intervention and regulation, so that helped. But the FSF had a big impact, going as far as getting Linux to be installed as a dual boot in state sponsored Notebooks for Kids programs.
The good thing is that the field is a bit more open if anyone wants to dethrone whatsapp, but since they were first movers and they have the network effects now, it seems like almost inconsequential, a contender could have negotiated zero-rating with a carrier anyways and work up from there.
Radio and TV neutrality was a hot political topic at the time as well, the incumbent government was pro-intervention and regulation, so that helped. But the FSF had a big impact, going as far as getting Linux to be installed as a dual boot in state sponsored Notebooks for Kids programs.
The good thing is that the field is a bit more open if anyone wants to dethrone whatsapp, but since they were first movers and they have the network effects now, it seems like almost inconsequential, a contender could have negotiated zero-rating with a carrier anyways and work up from there.