Galaxy S21 Ultra SIM Card Slot Guide
The Galaxy S21 Ultra features a hybrid SIM card slot that supports either two nano-SIM cards or one nano-SIM card and one microSD card for storage expansion.To access the SIM card slot on your Galaxy S21 Ultra, you need to use the SIM ejector tool that comes with the phone. The slot is located at the bottom of the device next to the USB-C port.
The SIM tray on the Galaxy S21 Ultra can accommodate either: Two nano-SIM cards for dual SIM functionality, or One nano-SIM card and one microSD card （up to 1TB） for additional storage.
When inserting SIM cards, make sure the gold contacts are facing down and the notched corner is aligned properly with the tray. Gently push the tray back into the phone until it clicks into place.
For optimal performance, ensure your SIM cards are properly activated by your carrier before inserting them into your Galaxy S21 Ultra.
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