Please excuse in advance the newbie-ish question. I read this thread carefully and you guys know a lot more about this than I do.
I want to buy an iPhone 6 here in the US for a friend in China. I'm going there on a business trip in 3 weeks. Now that the iPhone is delayed in China, it seems like a nice thing to do.
However, from reading up, my impression is that the unlocked phone I can buy here in the US relatively easily (ie, T Mobile version) will NOT work on the newest, fastest networks in China.
I have a US-bought unlocked 5s which I use frequently in China on China Unicom and I get 4G service there when it is available. I guess the competing China Mobile now has LTE available too but I've never seen LTE pop up on my phone in China. Looking at Apple's LTE page I don't see China Unicom listed, so maybe they don't have LTE at all.
So it seems that in order to have access to the fastest networks in China, the best thing to do is either try to buy in Hong Kong, or wait until it is available in China itself. Right?