https://us.community.samsung.com/t5/Galaxy-S21/SIM-not-working-after-One-UI-7-update-S21FE/m-p/3257240#M95772 I'm in the US and mine did that too but after a few restarts it hasn't given me the error. Mine is running smoother than ever before. Tue, 03 Jun 2025 17:59:56 GMT Chipper13 2025-06-03T17:59:56Z