LIMERICK, Ireland--(BUSINESS WIRE)--Tango Telecom, (www.tangotelecom.com), the leading provider of Data Solutions for evolving mobile networks, announced today that Grameenphone has successfully launched Tango Telecom’s Data Retail Engine, the Tango DRE™. Grameenphone is the leading mobile operator in Bangladesh and part of the Telenor Group which has a presence in 13 markets globally. “Tango Telecom’s solution give us an intuitive, automated way to engage with our subscribers in real-time usin