> The customer scans the code, sees the amount to be debited, and presses OK. The amount then moves from one phone to another without the need for WiFi or anoth

> The customer scans the code, sees the amount to be debited, and presses OK. The amount then moves from one phone to another without the need for WiFi or another wireless network How does the business verify a transaction was successful? It seems like information only flows one way.