Thanks zephyros.
Guess your first point is valid. The modchip used. But how do u tell it without opening the console. Will read out more from the website.
For 2nd pt, those guys are just BS. I don't look like a foreigner to them, what is the point of selling NTSC set to me right. Those guys there cannot be trusted. For example, I also asked cordless mic, Premire brand, 4 different ppl told me different country, from local, taiwan, china and one even say US. Waolao..