How to fix 'No SIM Card Detected' error on Galaxy phone
Samsung Galaxy S20 Sim Card Not Detected (How to Fix)
Solved: Cannot disable a SIM card - Samsung Community
SOLVED: No SIM Card Error On Samsung Galaxy [Updated Solutions] - YouTube
Amazon.com: s20 Ultra Dual Sim Card Tray Holder Replacement for Samsung Galaxy s20, s20 Plus,s20 Ultra (not fit for Note 20 Ultra,and not ok for Single Version,not ok for Note 20 Ultra) (