No SIM card alert on iPhone X

Tyr 01/04/2019

Get 'No SIM Card installed' alert with my iPhone X from time to time. I have tried to change the SIM card but the problem reappears again and again!!! So is this a hardware problem or software problem?
Answers

REWA

01/17/2019

Please check the circuit of Baseband, including baseband CPU, baseband PMU

Nicholas

01/15/2019

Hi Tyr, check the SIM card tray and SIM card reader. The two might be damaged. you can also restore the phone (back up first). 
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