I think I found some LTE antenna installations!
This is on Kauai. I live close to this tower and have been watching it closely - when I saw new gray antennas on it I had to take a closer look.
There were 3 of these antennas mounted to the tower in the last couple of days.
Zoomed in on one of the antennas now. It looks like that may be the RRU (new PCS 1900 style?) on the bottom, based on the AlcaLu antenna page. It's a little hard to see here, but that RRU definitely looks like the vented design seen here.
As you can see in the top photo, they've led black cables up to the three antennas that looks like it leads back to the base station on the bottom right.
Funny thing is, since these antennas have been installed, my service has gone to crap. I've always gotten full 6 bars standing 50ft away from this tower, and now I get around 2-3. Service dies about 1/2 mile up the road when before it would die about 2 miles up the road.
I'm not picking up any LTE signals, so I assume they haven't done the work on the ground yet, just mounted the antennas and run the cables. Anyone familiar with the process of installing this kind of equipment - do they usually mount the antennas first and then do ground work later? They left the gate to the tower property open, so I assume they're not done yet.