Hello everybody, I have a sister who will be touring the world to places like China, Japan, Korea, and Germany and I was wondering if there is anyway she can have unlimited data with her iPhone. She won't really be needing Talk or SMS but Data will be important for her. She does have AT&T as her carrier and I was able to unlock her device. I just need to know any options she has as in official plans by AT&T or prepaid international SIM cards. Any help, comments, or suggestions will be greatly appreciated.