The below is on AT&T:
The coverage map for Los Angeles, CA is also quite inaccurate. It shows Monterey Park, CA 91754 having coverage which in fact there are a handful of sites with LTE on them and not the entire city like the map shows. The same for VZW it shows my house covered but no LTE. I at least get 1 bar of LTE on AT&T when I am upstairs of my house near the Monterey Park Hospital.
Also, the best speed I got in Pasadena, CA outside of the Apple Store was 17.56 mbps down & 6.11 mbps up. Otherwise I have been averaging about 9 mbps down and 6 mbps up in Alhambra, San Marino, Pasadena, Monterey Park.