You will also need to purchase a WWAN card that is compatible with your service provider's network.  Before investigating that, open the system and ensure the antenna leads are present for the card.  If they're not installed, retrofitting them is just about impossible without a major refit (including in many cases, a new display screen).  If the antenna leads are not present, plan on needing a USB WWAN adapter. Service manual is here: [URL]  
hello how can i activate my dell latitude cellular data it has sim card slot so im planning to use simcard data for my dell latitude 5300 
Dell Latitude 5300 cellular data