Yes, I am currently writing this message using this exact model, with CleanRom.
Cellular south is your device's region, which is also your CSC. Doesn't really affects anything in terms of wifi (not sure about 3G, it might have slightly different frequencies, I don't know).
The only way it affected me is that my samsung keyboard doesn't have sub-characters enabled (long press for quick access), so i had to install Xposed to fix that (it still has sub characters in a menu, don't get me wrong).
You can ask me anything, I have this exact US model with XAR CSC
Hi, i have this version - P600UEUBMK1 (XAR). Can I update my galaxy note with the colombia kitkat version without problems?
Access and security are some of the key issues facingmobile technology. Whether … more
20 Sep 2014
By Faiz Malkani
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?