Comment They are not that great. Have caused me problems. (Score 2) 33
Some shopkeepers reluctantly agree to UPI even though they dont trust it. Then if you're buying from a roadside vendor or a noisy restaurant and the volume of that thing is low, they dont hear it and say you haven't paid. Sometimes the blue tooth connection cuts out, or hasn't been charged by the shopkeeper. It is great when it works but has caused me trouble once or twice.