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Mifare Compatible 1K Magic UID (7 Byte) – Changeable UID Gen 3 / APDU

£7.99 £6.79

UID writable Mifare 1k 7 Byte Gen 3 / APDU variant

Not all ‘Chinese Magic’ cards are alike. There are many chipset types, each with different levels of reliability and functionality.

  • 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.

Available for purchase on back-order and typically available within 2 weeks. For more information, email [email protected]

Mifare Compatible 1K Magic UID  (7 Byte) – Changeable UID Gen 3 / APDU Access Control KSEC
Mifare Compatible 1K Magic UID (7 Byte) – Changeable UID Gen 3 / APDU £7.99 £6.79
  • RFID Access Cards

    Need to test RFID compatibility or clone access cards ? Add now with up to a 5% discount


Free shipping on £10+ UK and £100+ International orders

  • £150+ International orders have free priority shipping
  • £150+ UK orders have free next day delivery
  • UK next day delivery available if ordered before 1pm, as well as worldwide express 3~ day delivery.
  • 14 day UK and 30 International returns for replacements, store credit or refund
  • Lifetime or limited warranty on applicable products

Available Payment Methods

UID Changeable cards are used to duplicate Mifare Classic 1K access cards.  Whilst generally it is best practice to use unique Mifare Classic 14443A cards for each user, there are some instances where you may wish to clone a card and have multiple cards with the same UID and data.  For example access control with few users with no user having the ability to add new cards into the system.  Or for access control that has a user limit which has been reached.  All three types of cards can be programmed with the Proxmark3, ACR122U or ICopy-xs.

Commands – Promark3 & Icopy-xs (PC Mode)

hf mf gen3uid --uid 11223344556677

Mifare Gen3 Proxmark Commands (Iceman Firmware)

# change just UID:
hf mf gen3uid
# write block0:
hf mf gen3blk
# lock (uid/block0?) forever:
hf mf gen3freeze

See also

script run hf_mf_gen3_writer -h


# change just UID:
hf 14a raw -s -c  -t 2000  90FBCCCC07 11223344556677
# read block0:
hf 14a raw -s -c 3000
# write block0:
hf 14a raw -s -c  -t 2000  90F0CCCC10 041219c3219316984200e32000000000
# lock (uid/block0?) forever:
hf 14a raw -s -c 90FD111100

By ACR122U (PCSC Mifare Secure)


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.

KSEC cannot provide support or refunds under any circumstances for cards that were ‘bricked’ due to incorrect UID/BCC configuration.