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
Hello,
You can easily check the UID length with the NFC TagInfo App available for Android / iOS in their respective stores.
Hope it helps.
BR,
Ivan.