India's Under-pressure Telecom Firms Hit With $13 Bn Bill

India's beleaguered telecom companies were dealt a blow on Friday after being told to pay a whopping $13-billion bill, though boosting Asia's richest tycoon Mukesh Ambani who has shaken up the sector with his low-cost deals.

After a two-decade legal wrangle, the Supreme Court ruled on Thursday that telecom firms had to pay a combined 920 billion rupees ($13.0 billion) in past spectrum and licensing fees.

British giant Vodafone's loss-making and indebted joint venture with local firm Idea was the biggest loser, being told to cough up $4 billion, Bloomberg News reported.

Vodafone's Mumbai-listed shares slumped more than 16 percent when the markets opened, before recovering slightly.

Vodafone Idea and Bharti Airtel, another major operator which was told to pay $3 billion, expressed their "extreme disappointment" in the decision, saying it will exacerbate the sector's financial woes.

The row centred on how licence and other fees paid by the firms should be calculated. The companies had argued they should be based on income from only their telecoms business, but the court said they must be based on the amount earned from all business dealings such as from handset sales and other income.

"This decision has come at a time when the sector is facing severe financial stress and may further weaken the viability of the sector as a whole," Airtel said in a statement.

Vodafone Idea said: "We urgently request that the government engage on this matter in order to find ways to mitigate the financial stress for the industry."

However, Reliance Jio, the mobile operator backed by Ambani and which turned the sector on its head in 2016 with free calls and ultra-cheap data, escaped with a relatively light $1.8 billion tab.

Many players have exited the sector in recent years or have gone bankrupt trying to compete with Jio.

"It is an unfair blow to existing telecom operators -- Airtel and VodaIdea," Baburajan K, editor of TelecomLead.com told AFP.

"Reliance Jio will definitely have an advantage in the upcoming quarters," Baburajan added.