Same here went from H though to 4G
It's just changing what it's calling it. It did not enable a hidden LTE radio. You're getting the exact same signal and the exact same speed. It's just calling it "4G" now, as do other Lumia phones. (when I leave an LTE area w/ my 1020 it shows "4G" instead of 3G or H or whatever.
Yeah, I don't know why they call it 4G LTE because they are not interchangeable terms.
Well, they were supposed to be until T-Mobile and AT&T just started calling their HSPA+ networks "4G" when Verizon started rolling out their LTE network way ahead of them.
Sprint was actually first out with a real 4G network, though it was their ill-fated WiMAX network which they've since abandoned and are finally rolling out an LTE network.
ATT has both 4G and LTE.