This is the UID changeable Mifare Classic 1k size key fob.
The UID can be modified ONLY with an external device (ACR122U, iCopy-X and Proxmark3)
The UID cannot be changed with NFC on Android or iOS devices.
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.