In a 3-2 vote, the agency decides to apply the same rules that govern telephone service to broadband, with the hope that it ensures the fair and equal treatment of all traffic on the Internet.
The carrier will sell the new Android-powered hotspot that supports up to 10 devices and has a Pico projector.
Ma Bell's next Android will be a wallet-friendly take on the plus-sized smartphone.
AT&T names veteran executive Thaddeus Arroyo CEO of the new Mexico City-based leadership team for Iusacell.
The carrier's new smartphone plan, which costs $10 less per month than the previous offering, goes into effect October 7.
AT&T is a step closer to expanding its wireless coverage outside the US, which would be a first for a US carrier.
This is the third time that AT&T has added unlimited calling to Mexico in its different plans. The company previously brought it to World Connect Value and its subisidiary Cricket Wireless.
Most of AT&T's customer gains in the fourth quarter came from its non-smartphone business.
The $1.875 billion deal follows its acquisition of Iusacell and bid to expand its presence in Mexico.
The carrier previously charged 1 cent a minute to wireless and landline numbers in Mexico.