Not recognising sim

[jackielala]

All of a sudden my S20FE won't recognise my SIM saying insert SIM. When I put the sim in my other Samsung its fine. I have tried everything, I have even reset it to factory setting. All to no avail, I've not had a problem with my phone before this problem arose overnight 

[Fizaan]

Have you tried putting another sim in the S20FE or checking if you have had it locked or something