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> powered remotely. Not from great distance but still. What do you mean with this? Do you have a link explaining in more detail?
by southerntofu 5y ago
> powered remotely. Not from great distance but still.
What do you mean with this? Do you have a link explaining in more detail?
- hypertele-Xii 5y agoOh sorry my brain skipped from SIM cards to other cards with NFC chips. I don't actually know if SIM cards do NFC. In short, computers powered wirelessly over short distances. A larger, fixed device with ample power ("card reader") produces a radio field; The NFC chip is an antenna with a computer that gains enough power from the radio field itself to do computation on the signal and transmit a response. Since the NFC chip is obviously very low power, it has to be close enough to be heard. But anyone with the right kind of portable card reader can attempt to communicate with your NFC cards in your wallet simply by passing you on the street. Phones, of course, already communicate over long distances, so NFC would be somewhat pointless on a SIM card specifically :P
- jeroenhd 5y agoSome SIM cards work together with certain banks to provide NFC payments. This is because the SIM card is a security chip by design, and some banks didn't trust the security of the smartphones that were common back then. I don't think they contain their own NFC hardware, but I've definitely seen a connection there.