https://www.reuters.com/article/us-mexico-telefonica/telefonica-teams-up-with-att-in-mexico-in-new-bid-to-take-fight-to-slim-idUSKBN1XV2CM

Spanish telecoms giant Telefonica has struck a deal to use some of U.S. rival AT&T's infrastructure in Mexico, a move analysts said would better position both to compete with the market's juggernaut, billionaire Carlos Slim's America Movil.