OK...so, this issue (though, I have a 12 kept getting worse for me. It got to the point where the error popped up every few minutes. We opened the little drawer and took it out....put it back in. Nothing. I reset the network. Nothing. I did it again following an online "fix it" from Verizon. That wiped the network totally out. COMPLETELY OU. There was no SIM info in settings. Got onto a chat with Verizon today. He treated it like it was a new activation (mostly, because it was still the same info, etc and not a new phone). He sent a QR code to another phone in our house. I scanned it and it went through the activation process and BAM! Up and running. So, eSim, apparently.... I did nothing with the actual card so maybe it wasn't used to begin with? I read that iPhones made after a certain date (like 2018ish?) all have eSim...why there is a card in it, I guess I don't know? Backup? It's been running without an issue for 6 hours now!