Yeah, I'd be interested in how this would be implemented as well. I'm guessing it's not as simple as "ending roaming charges" as that would be quite easy to gam

Yeah, I'd be interested in how this would be implemented as well. I'm guessing it's not as simple as "ending roaming charges" as that would be quite easy to game - setup a single-mast cell phone provider in the middle of a Finnish forest, and demand that all other providers carry your clients traffic for free. Clearly, the network in which another networks' clients are roaming must be compensated somehow, it's just that the price will be capped at some level.