The Telecom Regulatory Authority of India has advised users not to pick unknown calls with the codes +92 (Pakistan) and +375 (Belarus). If you have a missed call from these numbers never call back. Calling back will lead to 50 to 100 rupees deduction from your call balance.

"Please call me back, this is urgent." Such messages should also be ignored from +92 (Pakistan) and +375 (Belarus).

The Quint spoke to service providers to find out if they are aware of 'One Ring Scam' and the TRAI guild lines.

Airtel customer care was confused and didn’t have a clear answer. Vodafone had its team working on the issue.

Neither service provider are sending out SMS’s or calling customers to inform them.