Facetime connectivity issue when using only wi-fi
I'm trying to start a facetime call with another person and having all sorts of issues.
my iPhone is wi-fi only, with airplane mode turned on. I'm doing this because I'm out of the country and don't want to use cellular out of the US. My understanding is that as long as I have Wi-fi, I should be able to use facetime, but every call I make fails.
I also tried having someone facetime me from the US and they're not able to complete the connection either. These failers happened between 2 iphones, both on wi-fi.
Any idea what's going on? I have been able to make facetime calls in the US but this is the first time I've tried in Brazil.
iPhone 4, iOS 5.1