Ky Tavares

In Africa I'd use the EU setting.
 
I'm reading that maybe you want to use the WIFI REGION "A" setting.
 
http://www.tomsguide.com/answers/id-2310114/samsung-smart-un46es6100-connect-wireless-network-anymore/page-2.html
https://www.cnet.com/forums/post/214384ae-830e-4acb-9cfb-0c10918b2ede/
 
Might not be your exact TV but they sound like they have similar operating systems and settings.  I'd definitely try "A".  Let us know how that works.

I believe they're referring to channel designation in each country.
 
United States - channels 1-11
Europe - channels 1-13
Japan - channels 1-14
 
This does not affect power output or anything else.  The channels themselves are also the same.  Many routers stick to 11 channels to remain world-compatible.
 

Who can explain me what does mean WIFI REGION? And, how can I know WIFI Region of my country?
Best