The Telecom Regulatory Authority of India (TRAI) has sought explanation from global calling card companies including Matrix, Uniconnect and Oneworld Teleservices over instances of unsatisfactory service quality provided to consumers. The move comes after an SMS-based survey initiated by the regulator revealed that nearly half the consumers who used the services felt that it worked partially or did not work at all.

TRAI has asked the companies to check their records, analyse the issue and revert with their responses over the next few days. The regulator is also looking to recommend stringent service quality measures around international SIM card and global calling cards sold in India. These may include mandating a 24-hour toll-free customer care number and refund of money in case of inferior service quality.