Why won’t my iPhones read the SIM card after updating to iOS 18.5?

I have two iPhone 13 Pro and one iPhone 12, all three have the same problem after updating to iOS 18.5, it does not read the SIM card, before this they worked perfectly, it already performs network and cell phone restoration, I tried with esim, also reinstalling the software but nothing works, the operator does not have any updates and also the SIM does work on another Samsung device, I took one of the 13 Pro to technical service 2 months ago and they still have not returned it to me because they do not detect the hardware failure. any solution? is it possible to downgrade iOS?

[Re-Titled by Moderator]