5G 4G 3G are cellular not wifi connection. You can remove the internal card and use an external card via usb.  Mini pci-e is too much of a pain.  [URL]  
Can we replace WiFi card in Inspiron 2020 All In One Desktop? I need to upgrade it to support 5G connection.  
Is there any possibility to upgrade WiFi Card in Inspiron 2020 All-In-One 
Desktop?