Darn did you ever think, that being in that metal can called a rail road car could have something to do with signal degredation. I travel constantly from DC to Newark and I get good results with my LG G7
You guys failed to realize though, with Verizon's 5g, you have to be standing within 300 feet or less of a node to get anything, while you can drive around with Sprint's which has greater coverage.
Now Apple is going back with Qualcomm, they settled, Apple paid Qualcomm undisclosed amount, Intel getting out of 5g for mobile business. Intel wouldn't have had 5g modem until 2021.