Cellular Operators Association of India (COAI) released a public advisory warning users not to reply to fraudulent SMS messages or calls related to KYC documents.
COAI said these fake messages and calls, including those threatening to block SIM card, are from mischievous elements.
"If the false directives are followed, it can potentially lead to privacy breach or financial or data loss,” said S P Kochhar, Director General, COAI.
In his statement Kochhar added that users should follow only those messages sent by their operator from their designated SMS IDs.
Vodafone Idea (Vi) had also cautioned its customers against such unauthorised calls and messages.
“All customer communication from the company is only done from the SMS ID ‘ViCARE’. Any SMS being acted upon which is not originating from ‘ViCARE’ is strictly not advisable,” said Vodafone Idea's statement.