Welcome to the community.
I would like to inform you that sim card slot is available so that you can use 3g broadband on the system as well if required.
In order to make it work you need to ensure the mobile broadband application and drivers are installed on the system.
Please let us know which mobile broadband card is installed on the system so we can provide you with the relevant drivers and applications. You can also download them yourself at the link below:
Thanks and Regards