https://nalar.dev/tags/mobile/ Recent content in Mobile on Nalar Hugo en-us Mon, 14 Sep 2026 00:00:00 +0700 https://nalar.dev/nfc-phones-couple-with-nearby-tags-through-magnetic-fields/ Mon, 14 Sep 2026 00:00:00 +0700 https://nalar.dev/nfc-phones-couple-with-nearby-tags-through-magnetic-fields/ <p>Tapping a phone against a payment terminal, transit gate, or small sticker looks like a tiny version of ordinary wireless communication. The radio behavior is different from a Wi-Fi or cellular link, though. NFC is built for very short distances and commonly relies on magnetic coupling between antennas placed close together.</p> <p>That short operating range shapes both the hardware and the interaction. A phone can exchange data with another powered NFC device, but it can also communicate with a passive tag that has no battery of its own.</p>