Microsoft Surface Pro Getting Started page 8

Option 2: Use the embedded SIM (eSIM) card
1. Go to the Start menu and select Settings > Network & Internet > Cellular.
2. Select SIM 2 in the menu.
3. To buy data from the Windows Store, select the Network icon on the taskbar. Then
select the cellular network from the list of available networks, and then select Connect
with a data plan.
Note: For more help with the embedded SIM (eSIM) card and purchasing data from
the Windows Store, go to support.microsoft.com.