The rise of LTE has brought alongside it a dream we’ve yet to see realized: that some day pure-LTE phones will be the norm, and we might finally get smartphones with radio support so broad that they could function on any carrier in the US. As things stand, we still have a long way to go, and all the currently-available LTE phones also have 3G and legacy voice support that can be carrier-dependent. Still, we’ve seen progress towards this goal, like the recent news of AT&T, Verizon, and T-Mobile trying a ...