This is Gen3 7 Byte UID changeable Mifare Classic 1K S50 magic card.
The UID can be modified ONLY with an external device (PN532, PN532Killer, ACR122U, Proxmark3 RDV4, Proxmark3 X, and iCopy-XS).
PCR532 can read the write the data but not able to change the UID of the Gen3 Magic Card.
The UID cannot be changed with NFC on Android or iOS devices.
How to change Gen3 Magic Tag UID
By All-in-one PN532 with Bluetooth
The latest features of the MTools BLE support modifying the UID of the Gen3 4 Byte and 7 Byte S70 4K, Gen3 4 Byte and 7 Byte S50 1K Tag via Bluetooth PN532 Reader.
MTools BLE can be downloaded from Play Store and App Store.
You can also DIY the custom PN532 Reader with BLE module. See the tutorial below to know how to make PN532 work with Bluetooth.
By ChameleonUltra or ChameleonUltra SE
The UID Changer tools in MTools BLE App supports changing the UID of Gen3 7 Byte S70 4K card via Chameleon Ultra easily.
Note: The UID Changer is the paid features of MTools BLE App.
By Proxmark3 RDV4, Proxmark3 X or iCopy-XS
hf mf gen3uid --uid 11223344556677
By ACR122U
Windows Program Download Link: PCSC_Mifare_Secure.
Notice: Google Drive may recognize the PCSC Mifare Secure program as a virus cause it can detect the USB devices which it's necessary to connect the reader. Absolutely it's a clean and powerful program. Download the zip file with the browser on PC.
Very happy with my purchase! The 7 byte UID changeable feature is exactly what I needed and it worked perfectly with my ACR122U-A9.
I ordered this card for a project at work and was not disappointed. The 7 byte UID changeable feature made it easy to customize and it worked flawlessly with our Proxmark3 Easy.