India’s telecom leader Reliance said on Monday it is working with Alphabet Inc’s Google to launch a budget 5G smartphone as it laid out a $25 billion plan for introducing the next-generation wireless services within two months by Diwali.

Speaking at the company’s annual general meeting, Reliance Chairman Mukesh Ambani said Jio’s 5G network will be the world’s largest, launching in main cities, including New Delhi and Mumbai, before being expanded across India by December next year.

Ambani, one of India’s richest men, said only that the phone being developed with Google would be “ultra-affordable”. The cheapest 5G phones retail for around $150 currently in India, where around 700 million people don’t have a smartphone, a Reuters report stated.

“To take the 5G mass market, a sub-$100 phone is imperative and Jio is rightly positioned to bring 5G to the masses,” said Neil Shah, vice president of research at Counterpoint.

5G data speeds in India are expected to be about 10 times faster than those of 4G, with the network seen as vital for emerging technologies like self-driving cars and artificial intelligence.

Reliance’s 5G plans throw down the gauntlet to rivals Bharti Airtel and Vodafone-Idea in the world’s second biggest mobile market.

Jio, India’s biggest mobile carrier with more than 420 million customers, snapped up airwaves worth $11 billion in a $19 billion 5G spectrum auction earlier this month.

The aggressive 5G strategy builds on Jio’s playbook of disrupting India’s telecoms market having sparked a price war in 2016 when it launched cheap 4G data plans and free voice services, and later a 4G smartphone costing just $81, again in partnership with Google.

With a market value of $220 billion, Ambani’s business empire spans telecoms, retail, oil-and-gas and new energy.

He said he was among those mentoring his children on a daily basis as they begin to take the reins at the company, with Akash and Isha assuming leadership roles in Jio digital and in retail respectively, and Anant joining the new energy business.

A PTI report stated Ambani said, “To build our pan-India true 5G network, we have committed a total investment of Rs 2 lakh crore. Jio has prepared the fastest ever and most ambitious 5G rollout plan for a country of our size. Within the next two months. That is by Diwali, we will launch Jio 5G across multiple key cities including metro cities of Delhi, Mumbai, Chennai and Kolkata.”

Ambani said subsequently the company plans to increase Jio 5G footprint month-on-month until December 2023, to deliver Jio 5G to every town, every ‘taluka’ and every ‘tehsil’ of the country.

Ambani during the AGM said with 5G in place, Jio will launch billions of smart sensors with connected intelligence that will trigger the Internet of Things and fuel the fourth Industrial Revolution.

“It will connect every one, every place and everything with the highest quality and most affordable data,” he said.

Ambani said Jio made strong progress in fibre and FTTH deployment with a pan-India fibre-optic network of more than 11 lakh route kilometres. He said two out of every three new fibre-to-the-home (FTTH) customers are choosing JioFiber.

In about two years of commercial rollout of its fixed-line broadband services, Jio toppled 20-year-old state-run telecom company BSNL as top service provider in the segment in January.

“India is ranked 138th in the world in fixed broadband adoption. Jio will take India to be among the top 10 globally in fixed broadband adoption,” Ambani said.