By R. Jai Krishna

NEW DELHI--India on Wednesday began an auction of frequencies to cellular operators as it seeks to raise 800 billion rupees ($12.92 billion) through nontax means to improve the country's weak financial position.

The auctions began this morning, two company executives, who are bidding for the frequencies, told The Wall Street Journal on condition of anonymity.

Six telecommunication companies are vying to secure bandwidth, including India's top-four cellular firms: Bharti Airtel Ltd. (532454.BY), the local unit of Vodafone Group PLC (VOD.LN), Idea Cellular Ltd. (532822.BY) and Reliance Communications Ltd. (532712.BY).

"There is lot at stake," one of the executives said.

The auction, which was delayed from February 25, is important for telecom firms, some of which have expiring regional operating permits. Failure to secure the 20-year extensions could mean they have to shut down operations in some areas. Meanwhile, carriers also want more bandwidth to expand their service offerings as demand for mobile data and high-speed internet jumps.

The auctions are also crucial for the government to boost revenue and keep the country's fiscal deficit within the targeted 4.1% of gross domestic product in the year ending March. Analysts said that while a highly competitive bidding process means the government could hit its fundraising target, companies may end up taking on too much debt, boosting debt-to-equity ratios and bringing about earnings volatility.

New Delhi is auctioning bandwidth for global system for mobile communications, or GSM, technology; code division multiple access, or CDMA, technology; as well as frequencies for third-generation or 3G mobile technology used in high-speed internet services.

Starting bid prices range between 21.91 billion rupees and 37.05 billion rupees ($355 million-$599 million).

Bidding is set to be intense as supply is limited and cellular operators try to retain existing spectrum and acquire new bandwidth, Fitch Ratings said. It expects cellular operators to spend at least $13 billion in the auctions, with more than 75% of that coming from the top-four telecom firms.

The sole foreign participant, Norway's Telenor ASA, hopes to secure new frequencies to expand its operations in India.

Reliance Jio Infocomm Ltd., the yet-to-be-launched telecommunications venture of Reliance Industries Ltd., is also in the race for bandwidth as it plans to offer telephone-to-television services on smartphones and tablets.

Russia's Sistema JSFC has stayed away from the auctions citing high prices.

A day ahead of the auctions on Tuesday, UBS said it believes that the market is "overly pessimistic" on the outcome of the frequency sale. "We choose to take a contrarian view and feel the outcome of spectrum auctions could be a strong re-rating event given the uncertainty surrounding spectrum renewals is likely to dissipate post auctions," UBS analyst Suresh A. Mahadevan said. "Also, we do not believe RJio has the ability to disrupt the mobile market given the company lacks a mass market offering."

UBS has a Buy rating on Bharti and Idea Cellular.

Write to R. Jai Krishna at krishna.jai@wsj.com

Subscribe to WSJ: http://online.wsj.com?mod=djnwires