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Short answer: NFC is one narrow slice of RFID — 13.56 MHz, tap range, and already built into every modern smartphone. What Indian industry usually calls "RFID" is UHF at 865–868 MHz, which reads several metres away and counts hundreds of tags at a ti..

Short answer: An RFID reader broadcasts a radio signal, a passive tag harvests power from that signal and reflects it back with its stored ID number (a technique called backscatter), and software turns that ID into a business record such as "carton 4..