Samsung Confirms: Galaxy S21 FE Will Have Dual SIMs in US | PCMag
Amazon.com: P&R, PandR Galaxy S21 S21 Plus S21 Ultra Dual SIM Card Tray Holder Slot Replacement Parts for Samsung Galaxy S21 S21 Plus S21 Ultra 5G Type C and Eject Pin Phantom
Amazon.com: s21 Ultra Dual Sim Card Slot Holder Replacement Tray for Samsung Galaxy s21 Ultra SM-G998B 6.8 inch,Sim Card Slot Also fit for Galaxy s21 Plus SM-G996,Galaxy s21 Tray (Black) : Cell
s21 ultra duel sim issue - Samsung Community
Solved: S21 series have dual sim? - Samsung Community
Ultimate Guide for Using SIM Card on Galaxy S21 - Samsung Galaxy S21 Guides