The commission voted 3-2 Thursday to require mobile-broadband roaming agreements between carriers in a move largely targeting AT&T and Verizon, the two largest mobile carriers in the U.S. The commission's two Republicans voted against the order, arguing that the FCC has no congressional authority to enforce common-carrier rules on mobile broadband service.
http://www.pcworld.com/businesscenter/article/224598/fcc_requires_dataroaming_agreements.html