AnsweredAssumed Answered

4 Byte or 7 Byte UID Mifare Classic

Question asked by Mark Hunter on Feb 7, 2020
Latest reply on Feb 10, 2020 by IvanRuiz

Hi ,


Can anybody tell me how I can tell if my Mifare classic chip is a 4 byte or 7 byte UID please? 


I have the NXP Mifare reader app on my phone but I don't know which part of the data relates to the UID byte size. 


Many thanks