Facebook Inc. has launched the WhatsApp payments service in India after partnering with billionaire Mukesh Ambani to expand its operations. The National Payments Corporation of India stated that WhatsApp Pay will use India’s own multibank Unified Payments Interface (UPI) for the transactions.

As many as 20 million users can sign up for WhatsApp Pay before the US company gradually expands its UPI base. The testing of the payments feature started in 2018.

In April, Mark Zuckerberg had signed a $5.7 billion deal to buy a 9.99 percent stake in Ambani’s Jio Platforms Ltd.

Jio has brought in investments of over $20 billion from companies like Intel Corp. and Google.

“Now you can easily send money to your friends and family, just as easily as sending a message. There’s no fee and it’s supported by more than 140 banks,” Zuckerberg said, while announcing the new WhatsApp feature.

The WhatsApp payments feature is available in 10 regional languages of India.

India has a huge payments market with applications like Google Pay, Paytm, Walmart Inc.’s PhonePe and Amazon.com Inc.’s Amazon Pay already enjoying lion shares of users.

Messaging app WhatsApp has an advantage that over 400 million users of the app are based in India and thus they aim to make $1 trillion earnings by 2023.

“Starting today, people across India will be able to send money through WhatsApp. We’re excited to join India’s campaign to increase the ease and use of digital payments, which is helping expand financial inclusion in India,” the company said in in blog on Friday.