Abhishek looks at it as a fight they have to win against cash. Cashless and cashier-free stores are already booming in China, with more than one-third payments in offline stores done by mobile-wallet providers WeChat Pay and Alipay. “In India about 77% of payments are made in cash,” he says. If they need to convince people to try other payment options, they need to be able to accept payments from every consumer device, including feature phones, he adds. Tonetag has the solution. In the case of the feature phone, you dial 99 (an Interactive Voice Response or IVR number) and tap the merchant device. The customer’s phone then records a unique tone that is generated with each transaction and is sent to ToneTag’s server . The server then decodes the tone and sends it to the customer’s bank, which then releases a confirmation to the merchant. ICICI Bank, Airtel Money, Shoppers Stop, Mobikwik, First Abu Dhabi Bank, Japanese technology conglomerate GMO, and several toll operators are already using ToneTag technology, with the company looking to develop more use cases beyond payments.