Reading and capturing contents of the cardĪfter some investigation I noticed that my Samsung mobile phone has a NFC reader. MiFare Ultralight cards have a 7-byte UID that uniquely identifies the card. MiFare Ultralight cards typically contain 512 bits (64 bytes) of memory, including 4 bytes (32-bits) of OTP (One Time Programmable) memory where the individual bits can be written but not erased.
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