AT&T appears to charge more for iPad data plans than many other carriers across the globe, according to data gathered by Tableau Software. Under AT&T's latest data plans, US customers pay $12.50/GB to use data on the carrier's 3G network. Out of 35 total carriers, only five charge more per GB than AT&T. The list is topped by Orange in France, where customers pay $25.47/GB when the price is converted to USD.