TRAI observed a sharp rise in fraudulent and fake calls in recent times.
TRAI has assured users that critical services like OTPs will remain unaffected.
This latest verdict of apex court reinforces its original stance on the long-standing dispute over the calculation of AGR.
In its latest move, TRAI has blocked around 2.75 lakh mobile numbers.
TRAI has intensified its efforts to curb the misuse of messaging services by telemarketers.