NO SIM (Different symptoms to the other questions)

I know this has been discussed a lot on here, but I cannot find an issue with the same symptoms as me.

Mine just simply says “No Sim" all the time. It never says “searching" or has a triangle warning or anything.

I've tried putting in a sim card from each of the main carriers and it's the same thing: Insert sim, nothing happens. Just “No sim". These are all brand new sim cards.

I do get an IMEI number and I don't have a CCID number in settings.

My guess would be the actual sim card tray itself is faulty, as there seems to be no response at all when a sim is inserted. I know that's a very rare fault though.

I was going to replace the baseband IC, but everyone who has done that has “searching" and has no IMEI, so that can't be the right fix for me.

I have already tried resetting network settings and restoring/wiping the phone. None of that works.

Any help would be great. Thanks, folks