Reasonably certain that I'm getting an LTE connection from HO03XC319, Netmonitor is showing me connected to that tower and I'm getting 4G for the first time at this location. I uploaded it to Sensorly, and a new dot showed up.
I'm in northwest Houston, and apparently the only towers in my areathat have been upgraded so far are over a mile away. I managed to get a 4G connection from the top floor of my office building once (got 3.8Mbps) but haven't since. A couple of the towers closer to me are on the 'past due' list, so I'm waiting eagerly.