New Delhi, Aug. 26 -- Imagine getting a call from your bank or insurance company about a payment, service or transaction, only to find that you cannot call the number back. This can leave you wondering whether the call was genuine - and, if it was, how to get back in touch with the bank or insurer.

The Telecom Regulatory Authority of India (Trai) is discussing a proposal with telecom operators to enable users to call back on the 1600-number series used by banks and other financial institutions for service and transaction-related calls, two industry executives and a government official aware of the matter said on condition of anonymity.

The move aims to improve user convenience and enhance trust in calls made from the 1600-number series,...