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Can UID be changed on Mifare 1K Card?
· 2019-10-13 ·
# PN532
# ACR122U
# NFC
# RFID
A lot of guys want to clone their access card, so they buy more mifare 1k card to copy to. But after the package received, what they found is that block 0 of sector 0 can not be modified. The answer is NO to general MIFARE 1K Card.
Main Reason
Card Type
Read/Write Device
Apps
Choose UID Changeable Card
The UID general MIFARE 1K Card is the first 4 bytes in block 0 of sectors 0 and it cannot be modified after manufactured.
The 1st generation of UID Changeable Card was named, Chinese Magic Card. Its UID can be changed by external device, such as PN532, ACR122U, PM3 etc. The device need to be worked with nfc-mfsetuid on Linux or
RFID Tools
on Android.
The 2nd generation of UID Changeable Card was named CUID Card, the block 0 of sector 0 can be edited like other blocks. It can be modified with interial NFC by
MCT
,
MTools
also
RFID Tools
.
Choose An External Device
PN532 – The most cost-effective device which is less than $5.
ACR122U – Full SDK support on Android, Linux and Windows. Same chips as PN532.
PM3 – Full-encrypted MIFARE CARD cra

Source: Can UID be changed on Mifare 1K Card? | W!K!