Mexican mobile operator Telcel has launched 4G LTE services in Piedras Negras, Coahuila state, reported Telecompaper.com on Sept 16, 2014. With this launch, Telcel already offers LTE services in 46 cities across the country. The operator had recently launched its 4G network in Ciudad Mante and Matamoros. The operator said the firm\'s LTE portfolio includes over 30 smartphones, tablets and modems. Telcel is owned by Mexican telecoms operator America Movil.