There are two ROMs for this phone. The China Unicorn and the other Chinese. I'm using the other, but I live in Europe and can't test 850 and 1900 bands. However I see, that the band selection menu has had some changes lately. So they might working on it. I guess there must be some Chinese people traveling to the US - at least from Hong-Kong - who want to make use of their phone out there. Or from Taiwan or Korea...
I suspect the hardware must be capable of handling those bands. I don't believe Samsung would ever produce intentionally a non-quad band phone...
Sent from my GT-N7102 using xda app-developers app
My phone version is
Baseband # ZCAMA2
I guess mine is the China Unicom version, but where can I download the other Chinese version?
Plus, ChinaUnicom is the only company release this phone, where does the other Chinese version come from? Is it samsung official or Carrier official or 3rd party?