INTRODUCTION Need to make perfect, undetectable clones of MIFARE Classic® 4K 4-Byte UID cards and tags ? Our UID Modifiable "Magic" MIFARE Classic® Compatible 4K Gen3 allow for UID Modification, Block0 modification and permanently setting the UID - making them the only undetectable 4K cards availble. Technical Specifications Feature Information Notes Chipset MIFARE Classic® Compatible Memory Size 4K UID Size 4 Byte / 7-byte UID Modifiable ✔️ Multiple times Chip Generation Gen 3 Chipset Generation Guide Write Method APDU Write Capabilities UID Modifiable Unlock Required DirectWrite / Block 0 APDU One Time Write Notes ✔️ ✔️ Device Compatibility Compatibility UID R/W Config Notes Flipper Zero ✔️ Proxmark / iCopy-X ✔️ ✔️ ✔️ Android & iOS ✔️ ✔️ ✔️ MTools BLE Recommended LibNFC ✔️ ✔️ ✔️ Raw APDU commands required ChameleonUltra ✔️ ✔️ ✔️ Requires Mtools BLE Premium Hands on: See the card in action LibNFC - change UID $ pn53x-tamashell > 4a 01 00 > 42 02 90 FB CC CC 07 XX XX XX XX XX XX XX Where xx xx xx xx xx xx xx is your target UID.For 4-byte cards, your UID will be 4-bytes, for 7-byte cards, the UID will be 7-bytes. LibNFC - Write to Block0 $ pn53x-tamashell > 4a 01 00 > 42 02 90 F0 CC CC 10 04 12 19 c3 21 93 16 98 42 00 e3 20 00 00 00 00 Where 041219c3219316984200e32000000000 is the value for Block 0. LibNFC - Lock the UID permanently: $ pn53x-tamashell > 4a 01 00 > 42 02 90 FD 11 11 00 Proxmark / iCopy-X - Change UID hf mf gen3uid --uid 11223344556677 # 7-Byte UID: Replace 11223344556677 with the UID hf mf gen3uid --uid 11223344` # 4-Byte UID: Replace 11223344 with the UID Proxmark / iCopy-X - Set Block 0 hf mf gen3blk 041219c3219316984200e32000000000 # Replace 041219c3219316984200e32000000000 with the Block 0 Value Proxmark / iCopy-X - Freeze UID hf mf gen3freeze # Freeze the currently set UID Live Demonstration - Proxmark Live Demonstration - LibNFC Unbricking "Soft-bricking" refers to when a magic card has been configured in a way that prevents it from being detected. Ways of soft-bricking tags include: Incorrect BCC Incorrect SAK Incorrect ATQA Incorrect ATS Incorrect ACL (Access Control) Values Some "soft-brick" situations can be resolved with special commands. If your MIFARE Classic® Compatible 4K Gen3 UID Modifiable is "soft-bricked", you can try recovering it with the following methods: With Proxmark / iCopy-X hf mf gen3blk 11223344440804000102030405060708090A0B0C0D0E0F # 4-byte UID cards hf mf gen3blk 112233445566770844000102030405060708090A0B0C0D # 7-byte UID cards With LibNFC 4-byte UID $ pn53x-tamashell > 4a 01 00 > 42 02 90 F0 CC CC 10 11 22 33 44 44 08 04 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 7-byte UID $ pn53x-tamashell > 4a 01 00 > 42 02 90 F0 CC CC 10 11 22 33 44 55 66 77 08 44 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D Via external reader/writer and MTOOLS Select the "UID Changer" function in MTools, select "bricked" and run the task IMPORTANT: Lab401 cannot provide refunds under any circumstances for cards that were 'bricked' due to incorrect configurations.
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