UID Changeable M1 S50 Block 0 Changeable Writable CUID FUID GEN1 GEN2 Key Fob Tags

Free Shipping for orders over $250.
SKU: SF6012

Qty Unit Price
1+ $1.77
50+ $1.10
500+ $0.72
Excluding Tax
pcs

UID Changeable key fobs are used to duplicate Mifare Classic 1K access cards and keyfobs.  Whilst generally it is best practice to use unique Mifare Classic 14443A tags for each user, there are some instances where you may wish to clone a card or fob and have multiple tags 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 fobs can be programmed with the Proxmark3, ACR122U or iCopy 3 devices.

IMPORTANT: There are three different types of fobs that you can choose from:

Type 1: Normal GEN1 UID Changeable Tags:

  • All blocks (including Block 0) can be re-written multiple times 
  • Use ProxMark3 (Magic Chinese Guy function) or libnfc to change UID. 
  • Uses "backdoor" technique to change/rewrite UID. 
  • UID can be changed multiple times. 
  • Not suitable for MCT on Android (Mifare Classic Tool)
  • Answers to Chinese magic backdoor commands (GEN 1a): YES 

Type 2: Special GEN2 CUID Tags:

  • All blocks (including Block 0) can be re-written multiple times 
  • Not easily detectable by a system with "anti-clone" feature 
  • IMPORTANT: Fob will die if an invalid Block 0 is written 
  • Use normal commands. eg. hf mf wrbl 0 B FFFFFFFFFFFF a473f601200804006263646566676869 
  • Answers to Chinese magic backdoor commands: NO 

Type 3: Special GEN2 FUID Write-Once Tags:

  • Block 0 can only be written once. 
  • Even greater protection from a system with "anti-clone" feature.
  • Also provides protection from accidental future modification of Block 0.
  • Use normal commands. eg. hf mf wrbl 0 B FFFFFFFFFFFF a473f601200804006263646566676869 
  • Answers to Chinese magic backdoor commands: NO

Generally, these cards are provided non-printed. Please contact us for more information if you would like these cards printed.

Similar Products

Also Purchased Products