So, I went to the local Social Security office in smallsville, CA. While waiting, I used my phone, and noticed that (Verizon) I was getting a 1x signal.
There are *no* 1x signal towers in my local area, it's all 100% digital. There aren't even any 3G towers that I know of. And when I left, within a few hundred feet, I resumed seeing 4G signal,like normal.