For what it's worth, I get close to 100mbps consistently on T-Mobile here with my 6S right now--and that's with only two channels aggregated. 300 would definitely be within reach with these new modems depending on where one lives and if T-Mobile shuts off their HSPA network altogether. Sprint, if they can densify enough, can probably take advantage of 600mbps right now thanks to their crazy amounts of band 41 spectrum.
Whether people really need it though is another question. I'd say ~10mbps is more than enough to browse the web and play YouTube videos but maybe some people actually feel the need to torrent from their phones or something.
Whether people really need it though is another question. I'd say ~10mbps is more than enough to browse the web and play YouTube videos but maybe some people actually feel the need to torrent from their phones or something.