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Google India launches payment service that sends money as SOUND




Google India launches payment service that sends money as SOUND

… above comes into play when both users are present for a cash transfer, as money changes hands thanks to use of ultrasonic audio QR codes.
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Google Tez App: How to Use and Early Takeaways

… person's ID, or phone number, you have to scan their QR code, so this is a simple and easy to use feature that could be used in place or QR codes.
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Google Debuts New Payments App In India

Cash mode was built using Google's proprietary AQR (Audio QR) technology, which is similar to QR codes but designed to be more secure.
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