Hello Marta,
Thank you for posting in Microsoft Community.
I understand the need to insert a SIM card in your Surface Pro 8.
Yes, the Surface Pro 8 has a SIM card slot that supports both LTE and 5G connectivity. You can insert a nano-SIM card into the slot located on the left side of the device. You can refer to the steps below:
- Place your Surface Pro 8 screen on a table and lift the kickstand to reveal the SIM door.
- Insert the included SIM ejector tool into the small hole on the SIM door to detach it.
- Push your SIM card into the SIM card slot until it clicks.
- Slide the SIM door into place, then press down until it clicks.
Check this link to see more information: Insert a SIM card into your Surface - Microsoft Support
Hopefully this helps!
Best regards,
Rolando S.