Angry [Q] Is GS4 region locked or not?

I would like to know if my Galaxy S4 is region locked or not. It was purchased in early May and runs the recently released KitKat update, it is the GT-i9500 model purchased in Asia. As I will be travelling abroad soon, I would like to know if it is region locked or not.

P.S. I am not asking about carrier lock, Samsung's region lock is the thing I'm talking about.