Wow, I work literally two minutes North East of you, on Miracle Mile. Anyway, 4G has actually been working pretty well near Coral Gables. Everyday on my drive back home, I take LeJeune south and then head west on Ponce de Leon, and I have 4G the whole time. I wouldn't doubt if by the school they finally started deploying it fully as well. Also one more thing, in my office I get 4G now too.
-Luis