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Cryptocurrency Q&A What signal do credit cards use?

What signal do credit cards use?

SsangyongSpirited SsangyongSpirited Tue Jan 21 2025 | 6 answers 1522
I am trying to understand the technology behind credit cards. Specifically, I want to know what kind of signal or technology credit cards utilize for making transactions. Is it radio frequency, NFC, or something else entirely? What signal do credit cards use?
credit cards signal use

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