New Delhi, July 10 -- Caller identification platform Truecaller may legally challenge the telecom regulator's directive barring it from labelling calls from the 140 and 1600 series as spam, arguing that the restriction undermines consumer protection by preventing users from being warned about numbers they have repeatedly flagged as spam.

"If they (regulator) tell us to do things that we believe are anti-consumer, we will definitely challenge," Truecaller chief executive officer Rishit Jhunjhunwala told Mint in an interview on Friday.

Jhunjhunwala said the company would first take up the issue with the ministry of electronics and information technology (Meity) and the Telecom Regulatory Authority of India (Trai), contending that numbers ...