The NFC sends data through electromagnetic induction between two Android-powered devices. Like Wi-Fi and Bluetooth and all other modes of wireless signals, the NFC works over the radio wave principle to send data. It is a small range of technology up to 4cm or even less to share data between two Android devices or between NFC tags and Android-powered devices. The term NFC refers to Near Field Communication that establishes a wireless communication network between two supported devices to communicate each other.
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