Wifi Country Code and klte (SM-g900f) and CM12 - Galaxy S 5 Q&A, Help & Troubleshooting

Hi guys. I bought a Galaxy s5 g900f (aka klte) with stock touchwiz android 4.4.2. In my country, Chile, it refused to connect to any wifi. I did some research, rooted it, installed Rom Toolbox, and I wrote a script that solved the issue, which set the wifi_country_code to us.
I was having some issues with LTE and 3g data connection, so i flashed cyanogenmod 12.1, because in my experience it has solved problems on other devices before, automagically (on passion, i9300, iyokan). Then, wifi stopped working. I looked everywere about how to solve the wifi_country_code issue on CM12 or lollipop, to no avail.
I was thinking about flashing CM11, but cant find CM11 for klte. Now, i'm thinking about going back to stock 4.4.2 . Can you tell me somethig to try before going back to stock?
device: Samsung SM-g900f (klte)
Current ROM: Cyanogenmod 12.1

I want to connect to the damn wifi, so if someone knows how to solve the damn wifi_country_code issue on lollipop on S5 stock, it would be helpful.

Getting angry and shouting damn a lot won't help
Have you asked in the CM12 thread?
EDIT - Now you're on Stock LP 5.0?
Which is it?
http://forum.xda-developers.com/showthread.php?t=1982149
Codes
http://web.archive.org/web/20080210040406/http://www.unicode.org/onlinedat/countries.html
http://iso.staratel.com/InfTech/ISO3166/CountriesCodes.htm

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