...just to clarify that it sounds like you need a mobile WiFi "hotspot" that connects to the mobile network for internet access and connects to devices in the house using WiFi.This isn't the same as a mobile "dongle" that you plug directly into a computer to give mobile broadband access. You won't be able to plug a computer dongle directly into a TV.Before buying anything, you should check that the TV supports WiFi (which it probably does, but it still needs to be configured to talk to the WiFi) and whatever device they will be using for WhatsApp (phone, tablet, computer...)
Michael Robinson ● 2415d