SamyGO

I have also a wifi problem on the UE40ES7000. Is it possible to plug in an external wifi adapter to my tv? If yes, how do you do that?

If not an expensive Samsung brand one, can be complicated or impossible. Better advice would be some cheap Chinese wifi/ethernet bridge, if you can't directly use wired.

So a external wifi adapter is probably impossible, but I can use a wifi extender to LAN connection? I read somewhere that a wifi extender is bad for the bandwidth, which causes slower wifi. Are there wifi adapters to lan connection?

Of course, that's what I was suggesting e.g:
http://www.aliexpress.com/item/CEL-VAP1 ... 42715.html