AT&T has chosen the AT&T name for its new wireless product in Mexico. They have combined the Iusacel and Nextel networks, started to add more cell sites, are upgrading the entire network to 4G-LTE, and should offer a very competitive product south of the border. So, how do you pronounce "AT&T" in Mexico? It should be: AH-TAY-Y-TAY...but their ads say A-TEE-N-TEE instead.
At MexicoCellular.com we now show AT&T as an official Mexico carrier and added Unefon as their prepaid brand, somewhat like GoPhone in the US. Additionally, AT&T has expanded the international calling abilities of their Cricket Wireless prepaid brand to include most of the western hemisphere as a reasonable add-on. The world indeed seems smaller.