Before i switched to TMO a month ago. i had LTE at my office near NW HWY and Abrams. Initially when i first got it i had about 8-10megs down.
That was a few months after it was switched on. Starting around November i was lucky to break 5 megs in the same place.
I live near down town Dallas and never got LTE there.. But i had the same thing happen on 3G. Data was 1-1.5 down on EVDO but things went down hill a few months into it..
I switched between a GS3 and EVO LTE, so it wasnt device specific. I think it was a PRL problem but well all know how that goes. PRL dont affect your data speeds.. LOL
Maybe in a few years ill give them a try again..