This is the UID changeable Mifare Ultralight Card.
The UID can be modified ONLY with an external device (PN532 BLE, ACR122U, Proxmark3 RDV4, Proxmark3 X, or iCopy-XS).
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.



Change UID with Proxmark3 X and iCopy-XS
Command hf mfu setuid --uid xxxxxxxxxxxxxx

Change UID with PN532 or PCR532
➜ ~ nfc-mfultralight -h Usage: nfc-mfultralight r|w <dump.mfd> [OPTIONS] Arguments: r|w - Perform read or write <dump.mfd> - MiFare Dump (MFD) used to write (card to MFD) or (MFD to card) Options: --otp - Don't prompt for OTP Bytes writing (Assume yes) --lock - Don't prompt for Lock Bytes (OTP) writing (Assume yes) --dynlock - Don't prompt for Dynamic Lock Bytes writing (Assume yes) --uid - Don't prompt for UID writing (Assume yes) --full - Assume full card write (UID + OTP + Lockbytes + Dynamic Lockbytes) --with-uid <UID> - Specify UID to read/write from --pw <PWD> - Specify 8 HEX digit PASSWORD for EV1 --partial - Allow source data size to be other than tag capacity
Change UID with Android App
Trademark notice: MIFARE®, MIFARE Classic®, MIFARE Ultralight®, and MIFARE DESFire® are registered trademarks of NXP B.V. This compatible product is not manufactured, sponsored, endorsed, or authorized by NXP B.V. Trademark references are used solely to identify product compatibility.

T5577 Key Fob - 50 pcs 








I am very satisfied with it.With libnfc it works perfectly on a linux operating system.I can also make clones with it, not just modify its uid.
Commands:
1.nfc-mfultralight -h
2.nfc-mfultralight r original.dmp (original card)
3.nfc-mfultralight w original.dmp –full (magic card)
4.nfc-mfultralight r copy.dmp (magic card)
5.diff original.dmp copy.dmp
Excellent. The UID can be changed by Proxmark3 with hf gen3uid command.