Before contacting your carrier with a SIM card issue, there are a few things you can try. You can remove the SIM card and check it for damage, or try using a different SIM card.
How to fix 'No SIM Card Detected' error on Galaxy phone
12 Things to Try When Your Sim Card Is Not Working
What is a SIM Card?
Samsung Galaxy Tab S9 FE 5G - Insert / Remove SIM Card
How to Remove the SIM Card From a Samsung Galaxy S10
Samsung Galaxy Tab S4 (T837A) - Insert SIM & Memory Card - AT&T
Samsung Tablet Sim initialization Failure Fix - samsung galaxy tablet verizon activation
Samsung Galaxy Tab S6 - Insert / Remove SIM Card
My SIM card network is not showing. What's happening? - Quora
9 Ways] Fix Phone Says No SIM Card Error on Android