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4 Byte UID Changeable 1K S50 Chinese Magic Card

Rated 4.73 out of 5 based on 11 customer ratings

(11 Reviews)

$1.80 – $22.50

Card Type

Amount

Clear

Mifare 1K 4 Byte UID Changeable Card.

Specifications

Card Type	UID, CUID, UFUID
Protocol	ISO14443A
Amount	1 pc, 5 pcs, 10 pcs
UID Length	4 Bytes
Working Frequency	13.56MHz
Memory	1KB
Device Support	ACR122U, iCopy-XS, PN532, Proxmark3 X, Chameleon Ultra, Proxmark3 RDV4
Card Type	UID, CUID, UFUID	Protocol	ISO14443A
Amount	1 pc, 5 pcs, 10 pcs	UID Length	4 Bytes
Working Frequency	13.56MHz	Memory	1KB
Device Support	ACR122U, iCopy-XS, PN532, Proxmark3 X, Chameleon Ultra, Proxmark3 RDV4

Card Features

Backdoor Command	Yes
Backdoor Command	Yes

Environmental Performance

Working Temperature	-20°C-70°C
Working Temperature	-20°C-70°C

Software

Android App	MTools BLE
iOS App	MTools BLE
Android App	MTools BLE	iOS App	MTools BLE

Weight	0.1 kg
Dimensions	8.55 × 5.3 × 0.08 cm
Card Type	UID, CUID, UFUID
Protocol	ISO14443A
Amount	1 pc, 5 pcs, 10 pcs
UID Length	4 Bytes
Working Frequency	13.56MHz
Memory	1KB
Backdoor Command	Yes
Working Temperature	-20°C-70°C
Android App	MTools BLE
iOS App	MTools BLE
Device Support	ACR122U, iCopy-XS, PN532, Proxmark3 X, Chameleon Ultra, Proxmark3 RDV4

Ordinary card VS Chinese magic card

How to clone an Mifare Classic to a CUID card?

Block 0 of the CUID card is changeable, so you just need to write block 0 or full dump to the CUID card with the NFC device.

If the BCC byte or SAK byte is invalid, MTools will not write block 0 to prevent damaging the card.

How to clone a card to UID card and UFUID card?

Both the UID card and UFUID card has backdoor command, so you can use PN532, ACR122U or Proxmark 3 to write dump back to data without keyA or keyB.

Command line to write dump file:

nfc-mfclassic W a u card.mfd

Command line to change UID:

nfc-mfsetuid 11223344

1-click to clone on Android:

Check out tutorial with MTools >>

How to change the UID with PN532?

We released PN532 CLI for PN532 and PN532Killer to change the UID super easy.

What’s the difference between UID card and UFUID card?

Both types of cards are responded to the backdoor commands which can be read, written, or cloned without key verification.

After locking, the UFUID card can be changed to an ordinary Mifare Classic Card. This operation cannot be reversed currently.

11 reviews for 4 Byte UID Changeable 1K S50 Chinese Magic Card

4.7

Based on 11 reviews

5 star	81	81%
4 star	9	9%
3 star	9	9%
2 star		0%
1 star		0%

Showing 9 of 11 reviews (5 star). See all 11 reviews

1-5 of 11 reviews

Scheszták Milán
Verified owner

November 21, 2023

Rated 5 out of 5
I am extremely satisfied.
Tested on Ehuoyan ER300L nfc reader. This reader recognizes 4 Byte 1K S50 clones. Ufuid card lock on linux operating system. Device used: ACR122U-A9
(Important: You must have libnfc, otherwise it will not work.)
Commands:
1. mkdir ufuid
2. cd ufuid
3. git clone https://github.com/duament/nfc-mflock
4. cd nfc-mflock
5. autoreconf -vis
6. ./configure
7. nproc
8. sudo make -j x
9. sudo make install -j x
10. nfc-mfsetuid xxxxxxxx
11. ./nfc-mflock (this command locks the card)

(0) (0)
- admin
  Store manager
  
  November 24, 2023
  
  Thank you for the sharing and tutorial.
  Also we’ve released the new functions for ACR122U in MTools app. It can read and write Mifare Classic Gen1.
  https://docs.mtoolstec.com/mtools-app/terminal-for-acr122u-and-pn532
Daniel Kim
Verified owner

February 20, 2023

Rated 3 out of 5
I was able to successfully clone my cards using this Chinese Magic Card. It works as advertised.

(0) (0)
Mike Williams
Verified owner

February 1, 2023

Rated 4 out of 5
I was able to clone my cards without any issues using this Chinese Magic Card. Very pleased with my purchase.

(0) (0)
John Smith
Verified owner

January 3, 2023

Rated 5 out of 5
This Chinese Magic Card really works. I was able to clone successfully without any issues!

(0) (0)
Anonymous
Verified owner

December 14, 2022

Rated 5 out of 5
Magic cards received and working as expected.

(0) (0)

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4 Byte UID Changeable 1K S50 Chinese Magic Card

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Q & A

What is the Unlock command? Jan asked on September 27, 2023

Send hf 14a raw command with 40(7), 43 will unlock the backdoor of Gen1A.

admin answered on October 13, 2023 store manager

(0) (0)

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How to deliver the virtual products?

The virtual products are delivered by email in time when order with only virtual products.

What are the shipping options MTools Tec offers?

We offer both standard and expedited shipping options for our customers. The delivery times may vary depending on the shipping address.

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Yes, once your order has been dispatched, we will send you a shipping confirmation email with your tracking number. You can use this number to track your shipment’s progress.

How long does it take to deliver my order?

The delivery time varies depending on your location and the chosen shipping option. Typically, it takes about 5-10 business days for standard shipping and 2-5 business days for expedited shipping.

Are there any shipping restrictions?

Shipping is usually available to all parts of the world. However, restrictions may apply to certain countries or regions due to international laws or shipping carrier limitations.

What should I do if I haven’t received my shipment yet?

If you haven’t received your order within the expected delivery timeframe, please contact our customer support team. We will help to track your shipment and provide updates.

What if my order arrives damaged?

If your order arrives damaged, please contact our customer support immediately. We will initiate the return process and take necessary steps to rectify the situation.

Can I change the shipping address after my order has been placed?

Depending on the status of your order, it may be possible to change the shipping address before the package dispatched oversea. Please contact our customer support as soon as possible to request changes.