Note 20 5G SIM card trouble

[WillB1187]

Every time I start running a diagnostic test on my phone, as soon as it gets to the third test (SIM test) without fail.... It fails. 

[realaud]

What happens if you run each test individually and skip the SIM test? This will help determine if it is the diagnostic tool that is faulty or your SIM.  If you can run the other tests with no problem, then it is probably indicative that the SIM is bad.