I might be late but I haven't seen anything official but sprint is turning on major LTE sites in Philadelphia, it's on in my neighborhood (West Oak Lane) and its finally up at the airport
Took a speed test..

It's dwarfs in comparison speed wise to Verizon, AT&T, and maybe T-mobile but for unlimited data.. It's fast enough
Took a speed test..

It's dwarfs in comparison speed wise to Verizon, AT&T, and maybe T-mobile but for unlimited data.. It's fast enough