T-Mobile for Business, the business-to-business unit of the third largest U.S. mobile network operator (MNO), brings services to small and midsize businesses (SMBs) typically available only to large companies. The latest offer from T-Mobile for Business is GoPoint, which provides a mobile point-of-sale (mPOS) system, including free same-day funding for card receipts. Merchants pay no monthly fee for the GoPoint service when they subscribe to a qualifying T-Mobile ONE mobile service. Debit and credit card (card present) transactions are processed for a flat 2.75%. GoPoint also promises SM...