Recall that time you were fumbling for change after buying a cigarette from the corner shop. While you were foraging in your wallet and pockets, another guy — a regular — may have stopped by, picked up the same cigarette and walked away, after a nod to the shopkeeper. How simple life would have been if payments were as simple as that nod! Bengaluru-based start-up, ToneTag believes it could be, with its technology.
A Bengaluru-based start-up is using sound waves to transfer data, which could change the way digital payments are being done
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