So, it is solved. Contacted the support that does on site repairs and they had me send them picture of the WWAN so that they have the serial on it and then send me link to a tool that I run. site has it labeled asDell Wireless 5821e and Dell Wireless 5829e/Qualcomm Snapdragon X20 LTE Customer Kit ToolI run 1_Click_Cust_Kit_Tool.exe and it was just a single button to enable wwan kard or whatever it was labeled.And then it just worked.
Got latitude 7300, it has sim card slot, and a slot ready for WWAN card with two antenna cables near it. Which WWAN cards does one need to buy to get LTE internet? Which one is officially supported?
Latitude 7300 and WWAN card, which model is officially supported?