I just called AT&T international # and found out their international plans. yes I pay $5.99 /mo for that call only plan and they will charge me $1.29/per min LOL, yes still expensive. I use to do the same... burrow a phone from a friend or use an unlocke phone then use the prepaid simcard from Taiwan, but I really want to use my iphone lol since it has navigation (GPS, maps) on the phone.
I found out from AT&T that the reason why I didn't get extra charge when I got a txt msg when I ever oversea was because the txt was incoming and was included but if I would txt back to that person, I would get charged about 50 cent per txt.
My question is what IF I answered a phone call from the US when I was in TW? Will I get charged?? Thanks.
Also... Will AT&T be able to do an factory unlock to my iPhone 4S?