The company 4T Sverige is a joint venture of the four mobile network operators (MNOs) in Sweden — Telia, Tele2, Telenor, and 3. It provides about 1.5 million of their subscribers with a mobile payment service called WyWallet, which can be used for person-to-person (P2P) and person to business (P2B) payments. Sweden has a population of 10 million. PayEx, a payment service provider (PSP), developed WyWallet and provides payment processing. PayEx offers WyWallet payment acceptance to its 3,500 brick-and-mortar, e-commerce, and mobile merchants in Sweden. WyWallet payments are initiated by...