MiFare Compatible 4K Magic UID (7 Byte) – Changeable UID Gen 3 / APDU

MiFare Compatible 4K Magic UID (7 Byte) – Changeable UID Gen 3 / APDU by KSec

• All blocks (including Block 0) can be re-written multiple times
• Use ProxMark3 (Magic Chinese function) or libnfc to change UID.
• Uses “backdoor” technique to change/rewrite UID.
• UID can be changed multiple times.

Important: The UID of MIFARE Classic® Compatible 1K Direct Write UID Tags is comprised of two parts: the UID itself, and the BCC. The BCC is a checksum value calculated from the UID. If the BCC is incorrect, tag will be rejected by the reader.

Most RFID tools, such as the Proxmark, LibNFC, MCT etc automatically calculate the BCC when the UID is modified. If you are modifying the UID by hand, it is vital that the BCC is correctly calculated.

No support or refunds under any circumstances will be provided for cards that were ‘bricked’ due to incorrect UID/BCC configuration.