Sim card usage in windows 10

The system also needs a WWAN card to connect to a PCS network -- which in turn requires antenna leads inside the system.  Open the system and verify that the leads are present (they're usually not if the system came without a WWAN card from the factory).  If the antenna leads are there, you'll need  a WWAN card compatible with your service provider's network. 

If the antenna leads are absent, retrofitting them requires replacing the display assembly, so it can get expensive.  A USB  WWAN adapter may be a better solution.

same problem too on latititude e6440

I have a laptop latitude 7480 with windows 10. Its having SIM card port. But I cant use  sim card is there anything you can do . Even its doesn't show the cellular network option. Can you please help me.

Thanks

The SIM slot (and card) by itself is unusable.  You need a WWAN card that's compatible with your provider's network -- and before buying one, be sure the system has the antenna wiring inside.  If it doesn't, you will also need to replace the display assembly.