SETUP GUIDE

How to Use Chameleon Ultra

Connect, update and configure authorized test slots with the right mobile or desktop app.

BluetoothUSBiOSAndroidWindowsmacOS
01Charge & inspect
02Install client
03Back up & update
04Connect BLE / USB
05Create test slot
Buy Chameleon Ultra MIFARE tutorial Authorized testing only.

Chameleon Ultra Devices

Android & iOS Apps

MTools BLE

  • Slot and dump management
  • UID tools for compatible Gen1a, Gen2, Gen3 and Gen4 research cards
  • Gen4 GUI Tools
  • MFkey32
App Store Play Store

CU GUI

  • Nested Attack
  • Slot BIN export
  • MFkey32
  • Writing compatible Gen1, Gen2 and Gen3 research tags
App Store Play Store

Windows & macOS Programs

Chameleon Ultra GUI

  • USB Connection
  • Nested Attack for key recovery
  • Magic card writing
Download for MacOS Download for Windows

Official Python CLI

Python-based CLI

  • Command-line workflow for advanced users
  • Nested attack for Mifare Classic
  • LF EM410 tag reading and supported writing workflows
  • HF ISO14443A raw commands
View on GitHub

Chameleon Ultra Posts

Chameleon Ultra vs Proxmark3

When it comes to RFID tools, the Chameleon Ultra and Proxmark3 are two of the most popular devices on [...]

04
Mar
How to clone Mifare Ultralight tag to ChameleonUltra

Cloning Mifare Ultralight tags to ChameleonUltra is a straightforward process that can be accomplished using [...]

09
Dec
How to use mfkey32 on ChameleonUltra devices

What’s mfkey32? MFKey32 is a technique used against Mifare Classic cards to retrieve sector data [...]

8 Comments

31
Mar
Chameleon & MTools BLE Review by RED TEAM

In the Christmas of 2023, the new version of MTools BLE released with the Magic [...]

20
Feb
Unleashing the Power of Chameleon Ultra through MTools BLE App

A new wave of tech innovation was ushered in with the introduction of the Chameleon [...]

2 Comments

11
Jan
What’re the Differences Between Chameleon Ultra & Chamele0n Ultra

Brand Owner The ChameleonUltra Repository was open-sourced by RRG – RFID Research Group. And they [...]

12
Aug
Chameleon Ultra CLI Tutorial by Iceman

Here’s a latest video made by Iceman to show how to download, compile and run [...]

09
Jul

Troubleshooting

Chameleon Ultra can work with compatible T5577 tags. A blank or incorrectly configured tag may not be detected until valid supported data is written with authorized tools.

Use MTools BLE or the official CLI only for tags you own or are authorized to configure.

Verify that the tag protocol is supported, update the firmware and test tag placement around the LF antenna area. If multiple known-compatible tags fail, contact support with the hardware version, firmware version and test results.

Yes, for authorized cards with compatible protocols and available keys. Use the MIFARE Classic dump tool in MTools BLE and save the original dump before making changes.

Confirm that Bluetooth is enabled, close other apps connected to the device, wake Chameleon Ultra, and retry from the supported client app. If pairing still fails, restart both devices and verify that the app and firmware versions are compatible.

Back up slot data, use the update method documented for the current firmware, keep the USB or Bluetooth connection stable, and do not interrupt power during the update. If the device remains in update mode, follow the official recovery instructions.

MTools BLE and CU GUI provide supported mobile workflows. Choose the app based on the protocol and feature you need, and see the MIFARE Classic guide for iOS and Android for compatibility details.