The Telecom Regulatory Authority of India on Friday said it has sought information from those mobile operators who are offering tariff packages along with a handset.

"We have sought information from all those operators who are offering a handset with a certain kind of tariff package," TRAI sources said.

Those which offer these services are Airtel in the GSM segment, Reliance, BSNL, and Tatas in the WLL CDMA arena.

Recently, Reliance Infocomm in its Monsoon Hangama scheme has offered a mobile phone on upfront payment of Rs 501 against the current entry cost of Rs 3,300 for limited mobility services.

The limited period offer, which began on July 2, will be available till July 31.

The deal is sweeter for Reliance's 3 million shareholders who will not only get the Reliance India Mobile connection free but also a credit of Rs 349 in their first bill.

Reliance Infocomm has said, "The limited period offer gives consumers a unique opportunity to own a mobile phone with both, a low entry cost and a low monthly spend."

Similar packages have been offered by the other mobile GSM or CDMA operators in a desperate bid to attract customers and fuel the ongoing tariff war.