this more of a post to give info as it has taken me quite some time to find out what Dongle will work with this unit.
I finally got some info from LG they say that Linksys WUB600N and D-Link's DWA 140 should work.
well I went and had a look today for one of these and Nope could not find any.
At home I had tried a Netgear WNA1100 which did NOT work.
But I then remembered that i had a HAMA dongle in the back of my Samsung smart LED screen.
not much info on it but Hama Wireless LAN USB 2.0 Stick Network adapter will find it on the internet
and this works. there maybe others that work but there is no official LG product provided and there is not info on their webby.