A few months ago, my phone stopped connecting to cellular. I often have no cellular connection, or it says "Verizon 1x" or "VZW" in the upper left corner - hardly ever LTE like the good old days a few months back. I've talked with Verizon technical support for hours, finally thought it was fixed, but no - it started right back up again with the spotty to non-existent cellular coverage.
See pic of my phone screen:
