Hi, I recently purchased a HP Elitebook 820 G1 2nd hand in great condition and I quickly learned that this laptop has a sim card slot but I also learned that I don't have the WWAN card (I believe that's what it's called please correct me if I'm wrong.) so the sim card wouldn't work but it definitely has the hook up for it as I saw that the wires for it are taped down and not connected to anything. I am a college student and having my laptop connected via 4g will be a great help but sadly after spending some time online looking for the WWAN adapter I can't seem to find what model I need (I am in the US if anyone is wondering). It would be great if someone here could help me find the right WWAN model. Thank you in advance!