Both phones were on 12.0 - no, didn’t toggle airplane mode. iPhone 7+ was just freshly booted. I did make sure speed tests on both were for the same server. It’s been pretty consistent this way. I don’t know that I’m experiencing the dropped calls, but I’m NOT getting the 2-2.5x speed.
Edit: I never experienced the issue with WiFi - it always seems to work fine for me. I’m maxing out on the ~200 down that I’m getting from my ISP.
Edit2: the LTE screen shots were from Verizon in the Greenville, SC area (servers in Clarksville, GA)