Here are some case studies I teach undergraduates as part of my Innovation Course at Richmond American University of London. This one focuses on the Jio Phone.
In 2016, India had over a billion mobile subscribers. Fewer than 30% owned a smartphone. Outside the major cities, mobile internet was expensive and unreliable. Samsung, Apple, and the budget Android players were all chasing the growing middle class. Nobody was designing for the hundreds of millions who had never been online.
Rural India had its own set of constraints. Low literacy made touchscreens hard to use. Connectivity was patchy. Premium handsets, even the cheap ones, were still out of reach. The industry's answer was always a cheaper smartphone. Still too expensive. Still built on assumptions that didn't hold for this market.
Mukesh Ambani, chairman of Reliance Industries, bet on something different. A different product entirely, designed around its users' constraints.
The product
The Jio Phone had a physical keypad and built-in 4G. That was deliberate. A keypad is easier to navigate than a touchscreen in areas with low literacy. It also meant a more durable device and much longer battery life.
The pricing broke the mould too. The phone came with a refundable deposit of 1,500 rupees, about $20, effectively free if returned after three years. It was bundled with Jio's data network, offering close to unlimited data at a fraction of the market rate.
None of this happened by accident. Reliance had spent four years and $32 billion building a 4G network before Jio even launched in 2016. By the time the phone arrived in 2017, the infrastructure was already there. The device was the last piece of a system, not a standalone launch. Network, device, pricing, content- all built together. That's what cheaper Android phones never managed.
The content mattered as much as the hardware. The phone shipped pre-loaded with video, messaging, and payment services in local languages, built around what people actually needed to do rather than what phones already offered.
The results
The Jio Phone became India’s best-selling 4G phone within a year. By 2019, Reliance Jio had over 300 million subscribers, making it India's largest mobile network and overtaking operators with decades-long head starts.
The shockwave hit the whole industry. Vodafone, Airtel, and Idea were forced to cut data prices by more than 50%. Two major operators went out of business or merged. India went from some of Asia's highest mobile data prices to some of the world's lowest.
The wider impact went beyond telecoms. For hundreds of millions of people, the JioPhone was their first access to digital payments, government services, education platforms, and video calls. India's digital economy expanded rapidly in the years that followed, with the Jio ecosystem at its centre.
In 2021, Reliance launched the JioPhone Next with Google, a true Android smartphone at a similarly disruptive price. The original phone had created the market. The next generation was built to grow it.
Why it matters
The JioPhone reminds us that the most interesting opportunities often sit where nobody else is looking. The industry was competing fiercely in the premium and mid-market segments. Reliance found the gap by asking a different question. Not ‘how do we make a cheaper smartphone,’ but ‘what does someone who has never been online actually need?’
It's also a lesson in systems thinking. The phone alone wasn't the innovation. It only worked because the network, pricing, content, and years of infrastructure investment were built around it as a single system. Miss any piece, and the product fails. Understand the whole system, and a $20 phone can reshape a country's digital economy.