The Telecom Regulatory Authority of India (TRAI) is taking active measures to control the menace of spam calls in the country. In a recent move, the country’s telecom watchdog has issued a directive to all network providers, asking them to stop promotional calls from unregistered callers, said an official statement released by TRAI said on August 13. As part of this order, TRAI has also asked telecom firms operating in India to blacklist spam…