Retailer Exito Group has launched wireless services via a mobile virtual network operator (MVNO) agreement with Tigo Colombia, STNews reports. Carlos Mario Giraldo Moren, Exito’s president, noted that the MVNO will not look to compete with rivals on pricing but plans to differentiate itself through better customer service and by leveraging its chain of stores. Plans are currently limited to pre-paid tariffs, although contract offerings are understood to be on the horizon.