Hey Guys, I'm going to spend a semester abroad in California in the upcoming Fall Semester. For sure, I'll take my iPhone with me! ;-) Now I'm searching for a cheap provider and I'm hoping for some insider tips from you. ATT and TMobile are quite expensive in my opinion. Virgin seems to be ok, but they told me, that they are using a different network (my iPhone 4S is GSM). I don't need a lot of included minutes or SMS. What's important to me is mobile data. Thanks in advance!