Forbes – In the never-ending mobile phone wars among telecom giants, Mexican billionaire Carlos Slim’s Telcel was forced by competitors to “eliminate” the Mexico-U.S. border and allow mobile users to call from Mexico to the U.S. and vice versa for just a small charge.

http://www.forbes.com/sites/doliaestevez/2015/08/03/mexican-tycoon-carlos-slims-telcel-erases-mobile-borders-between-the-u-s-and-mexico/