Gate Pay Complete Guide to QR Code Payments: How to Spend USDT at Over 17 Million Merchants WorldwideWhether youre grabbing a cup of coffee on the streets of Vietnam or shopping at a supermarket in Brazil, all it takes is a quick scan of the merchants QR code with your phone. Instantly, your payment is completed using the USDT in your account. This is no longer just a vision of the future—its happening now.