As we've received a lot of questions about the SIM cards on the S21, S21+ and S21 Ultra, we thought it would be helpful to publish some information on how to install them, as there have been some changes to our design in comparison to other devices.
Information about the SIM specification
How do I install the SIM card in the S21 series?
With an all new design, follow the below steps to install your physical SIM cards.
SIM slot 1
If installing a second physical nano-SIM card, flip over the SIM tray repeating the installation steps, installing it with the gold contacts facing out of the sim card tray.
SIM slot 2
Please note, you can use up to 2 SIMs on the S21, S21+ and S21 Ultra including an eSIM. This means you can either use 2x physical nano-SIMs or 1 physical SIM and an eSIM.
Hope this helps!
hello out there, does anyone know if the samsung s21 ultra will work with a cuban sim card from nauta?
i know it may or may not work through an american cell provider, just wondering if anyone has used a 'cubacel' card in this handset...