I may be speaking too soon but after trying everything with Apple form resetting up my phone from a clean "iTunes restore" and Verizon doing changes on their end and a SIM swapped, I did swap out my 12 Pro hardware with Apple and so far.....no issues. I was having issues with cell connection dropouts, difficulty connecting (seeing the "pulsing" of the cell trying to connect others have described) as well as not being able to receive incoming calls intermittently. So far...none of those have reoccurred with the new hardware. I've also had issues with missing iMessages/text messages which seems to be solve now as well. Don't know if that's also related to the new hardware or all the other things I had done with Apple and Verizon. I got the new hardware the day of 14.3 release so the new release may have helped too.