Open the Battery, The SIM card slot of your notebook is located in the battery bay.
Turn off your notebook
Remove the battery pack
Insert the SIM card with its printed circuit side down in the notebook's SIM card slot
Reinstall the battery pack and make sure it is properly connected and locked.
Ensure the WIRELESS switch is set to ON. (If you cannot locate the WIRELESS switch on your notebook, please check the user guide supplied with your laptop model.)
Ensure that the battery is properly installed in your notebook. WWAN will not work if the battery is not (correctly) installed.