Mysterious facetime problem

Hi guys,

I've been very frustrated with this facetime problem

I want to try facetiming with my girlfriend, she's in China, I'm in U.S.

everytime I facetime her it says XXX is not available for facetime,

however, she can facetime with her friends in China, not only that she can also facetime with her American friends

on my end, I can facetime with my friends here in U.S.

its just us that can't facetime eachother(we both use wifi and iphone5, im on ATT)


On her end instead of showing"XXX is not available for facetime", it shows just a black sreen which looks like trying to connect me and goes forever, never connects

*this issue is happening on all of my devices, not only iphone


Anyone can help me on this? I asked people in Apple store, they all feel its very strange

Thanks a ton!
Roger

 

I haven't tried facetime with people in China other than my girlfriend, but I know some of my friends here in U.S. facetime with their parents in China everyday, all works for them

ive read a lot of threads tried a lot of things, just wont work

 

so its a fckin fire wall things huh?