After fiddling around for 30 minutes with my useragent on my PC and Googling with my iPhone, I found out that AT&T's Wi-Fi is nearly impossible to get into by just spoofing your useragent and logging in as an iPhone. :-/ (I should've tried different ports than :80) Anyways, I heard over the intercom at the airport that I'm in (PHL right now) that students get free AT&T Wi-Fi. All I had to do was go to an information booth and ask for a coupon. I showed my student ID and I'm now surfing on free Wi-Fi. Sweet. Although I'm an AT&T iPhone customer, you don't have to be an AT&T customer at all to take advantage of this offer.