For the last several months the coverage for my iPhone 12 Pro, specifically on voice, has been awful. Rarely do I see more than two bars and 5G only shows when I am in a Verizon store. The speed on data has not been awful, although there are times when it is poor. But I am mostly on wifi and therefore it is not a problem. But the voice is terrible and it was never an issue before. Reading online, it appears there is something with the iPhone 12 (mine is Pro).
I have screenshots of when the signal drops completely and you only see "...." There is literally no signal. I took it into the store and they swapped the SIM card. Same issue again. Took it back, and they reset the Network Setting. Guess what? Same issue. I also was told it is a 5G issue and I am on a basic plan, so got sold on the best plan and most expensive. I did it as this is a work phone and I rely on it all day long. But now I am in between Apple and Verizon and both tell me it is another issue or it is fine. But the service is so bad that I am ready to drop the family 4 lines + watches + more and go elsewhere. It is a shame you have to waste time reading forums and posts to see if anyone else has the same issue. But what else do you do other than leave and go elsewhere? Cell coverage and phones have become the new cable company in my view. You pay more and get less.