Tigo is part of Millicom International Cellular S.A. (MIC). GSM Phones with operations in (El Salvador, Guatemala, Honduras, Colombia, Bolivia and Paraguay). Millicom International Cellular S.A. (MIC) , Group in Luxemburg, with 16 operations in the world. Serves about 392 millones suscribers worldwide. Tigo uses a GSM Network of 850 Mhz with SMS services , Internet, . GSM (Global System for Mobile Comunications), Network with 112 nodes in the country. In the past used CDMA, GSM and Analog technologies.