Only interact with tags you own or have explicit permission to audit.
Always create a full dump of a card before attempting to write data. Writing incorrect data to the "Trailer Block" (the last block of any sector) can permanently lock that sector if the keys are overwritten with unknown values.
This function scans the card and displays the data stored in its 16 sectors (for 1K cards) or 40 sectors (for 4K cards).
The tool can compare the data between two different tags or different saves of the same tag to identify where specific values (like a balance or an ID number) are stored.
Users can write specific data to blocks. This includes "Value Blocks" for credit-based systems and the "Manufacturer Block" (Block 0) on special "Magic" Chinese CUID cards.
📍 If MCT says "No keys found," you may need to use external tools like Proxmark3 to crack the keys first, then import them into MCT to perform mobile edits. If you'd like to dive deeper into using this tool: Step-by-step cloning guide (using CUID tags) Troubleshooting device compatibility (NXP vs. Broadcom) Decoding Access Bits (understanding sector permissions) Which of these areas should we explore next?
MIFARE Classic Tool (MCT) version 2.3.1 remains a cornerstone for enthusiasts and security researchers working with 13.56 MHz RFID technology. This Android-based utility provides a powerful interface for interacting with MIFARE Classic tags, allowing users to read, write, and analyze data directly from their smartphones. Understanding MIFARE Classic Tool 2.3.1
