Need to make clones of MIFARE Ultralight-C® tags? Use our UID Modifiable “Magic” MIFARE Ultralight-C® Compatible card.UID can be changed using a Proxmark using the following command:[usb] pm3 --> hf mfu setuid --uid 04159100023D7A [=] Please ignore possible transient BCC warnings [#] BCC1 incorrect, got 0x42, expected 0x45 [#] Using BCC1=0x42 to perform anticollisionAnd then validated via the following command:[usb] pm3 --> hf mfu info [=] --- Tag Information -------------------------- [=] ------------------------------------------------------------- [ ] TYPE: MIFARE Ultralight C (MF0ULC) [ ] UID: 04 15 91 00 02 3D 7A [ ] UID[0]: 04, NXP Semiconductors Germany [ ] BCC0: 08 ( ok ) [ ] BCC1: 45 ( ok ) [ ] Internal: 00 ( not default ) [ ] Lock: 00 00 - 0000000000000000 [ ] OneTimePad: 00 00 00 00 - 00000000000000000000000000000000 IMPORTANT:The UID of MIFARE Ultralight-C® Compatible 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.KSEC cannot provide support or refunds under any circumstances for cards that were ‘bricked’ due to incorrect UID/BCC configuration.
