I'm back up in PA this weekend, just got in a few minutes ago, and had the Photon Q in LTE-only mode now that I know how to switch to that, and Sensorly running in map mode, from about I-81 mile marker 230 south of Harrisonburg VA all the way to SR283 just east of Harrisburg PA. New areas I found which were previously unmentioned and/or unmapped:
(1.) I was able to reaffirm the pocket of LTE north of the already-mapped area of Harrisonburg that I found last time but Sensorly for whatever reason didn't upload into the database properly. Looking at the Sensorly map online right now, while it wasn't yet showing up on my phone, its now showing where I mapped earlier tonight extended up just past exit 264.
(2.) Looks like I was also able to get in some more fill-in mapwise from near Edinburg just north of exit 279 up to the Strasburg area which was the southermost consistent point that was previously mapped after Harrisonburg.
(3.) As of this posting it doesn't look like the map is updated yet from this point forward, but this time when I transitioned from Maryland into PA, I held onto LTE and stayed solid without any complete disruption all the way to immediately before exit 20. Right now (again, as I type this), Sensorly only shows 3 pockets of LTE at the state line, MM10-12ish, and up around Chambersburg, but I was able to stay with and hopefully map LTE solid all the way through and between those 3 points.
(4.) I finally was able to pick up some LTE after hopping on I-76/PA Turnpike this time around. Got a good strong signal from roughly about MM231 to just past the I-83 (Harrisburg/York) gate/offramp. I also picked it up again immediately upon reaching the bridge over the Susquehanna, but it only lasted maybe a half mile at best after getting through the toll gate and onto 283 (and also dropped completely while going through the toll gate I should add).
Really hoping those last 2 end up showing up on the map properly as well, but i'm particularly happy I finally got that stubborn patch north of Harrisonburg mapped, that'd been irking me because I knew it was there, but since I'm not exactly local, I couldn't easily just drive back out and try and redo it.