Apple's indoor mobile positioning system that identifies users with iPhones via a Bluetooth 4.0 Low Energy (BLE) network. In a shopping mall or retail store, wall and ceiling-mounted iBeacon transmitters send messages to iBeacon-enabled devices and may offer users information, directions or "today's specials." iBeacon debuted with iOS 7, and Bluetooth 4.0 was added to the iPhone starting with the 4S. Mobile Payments Unlike most other smartphone vendors, Apple never supported NFC communications, and iBeacon is expected to be Apple's foray into mobile payments. Since Apple has its customers' credit cards on file for iTunes shopping, that data could become available for making purchases in an iBeacon-enabled retail venue. See mobile payments service and NFC.