4 Byte UID Changeable 1K S50 Key Fob

Name: 4 Byte UID Changeable 1K S50 Key Fob
Brand: MTools Tec
SKU: MT_KF_S50
Availability: InStock
Rating: 4.94 (19 reviews)

Rated 4.94 out of 5 based on 17 customer ratings

19 reviews

$2.00 – $22.50

UID and UFUID types have backdoor command support to change the UID.

CUID type can be changed with all NFC devices.

There are 3 types of UID Changeable S50 China Mifare Key Fob, CUID Key Fob, UID Key Fob, UFUID Key Fob. The main difference is the method of changing UID and backdoor commands support.

Specification

Chip	Genuine Mifare 1K
Size	85.5 x 54 x 0.8mm
Frequency	13.56MHz
Protocol	ISO14443A
Memory	1024 bytes
Material	PVC
Operating temperature	-20 ~65 ℃
Writing Cycle	≥100,000 times

Ordinary card VS Chinese magic card

How to clone card to CUID card on Android?

The 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.

Apps for China Mifare Key Fob

MTools
RFID Tools
Mifare Classic Tool

Specifications

Card Type	UID, CUID, UFUID
Amount	1 pc, 5 pcs, 10 pcs
Memory	1KB
Device Support	ACR122U, iCopy-XS, PN532, Proxmark3 X, Chameleon Ultra
Card Type	UID, CUID, UFUID	Amount	1 pc, 5 pcs, 10 pcs
Memory	1KB	Device Support	ACR122U, iCopy-XS, PN532, Proxmark3 X, Chameleon Ultra

Software

Android App	MTools, MTools Lite
iOS App	MTools Lite
Android App	MTools, MTools Lite	iOS App	MTools Lite

Card Type	UID, CUID, UFUID
Amount	1 pc, 5 pcs, 10 pcs
UID Changeable	Yes (Backdoor Command)
Working Temperature	-20°C-70°C
Memory	1KB
Device Support	ACR122U, iCopy-XS, PN532, Proxmark3 X, Chameleon Ultra
Android App	MTools, MTools Lite
iOS App	MTools Lite

19 reviews for 4 Byte UID Changeable 1K S50 Key Fob

4.9

Based on 19 reviews

5 star	94	94%
4 star	5	5%
3 star		0%
2 star		0%
1 star		0%

1-5 of 19 reviews

김 성헌
Verified owner

Featured Review

March 13, 2021

Rated 5 out of 5
Verified review - view original
추천합니다. very good~~

(0) (0)
Michael Garcia
Verified owner

March 5, 2023

Rated 5 out of 5
If you need a Mifare key fob that’s easy to use and has a changeable UID, this is the one for you.

(0) (0)
Michael Garcia
Verified owner

March 5, 2023

Rated 5 out of 5
If you need a Mifare key fob that’s easy to use and has a changeable UID, this is the one for you.

(0) (0)
Sarah
Verified owner

March 4, 2023

Rated 5 out of 5
This key fob works perfectly with my system. I was able to clone my old key fob onto it with ease.

(0) (0)
Max
Verified owner

February 28, 2023

Rated 5 out of 5
This key fob has saved me so much time and effort. Changing the UID is a breeze.

(0) (0)

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4 Byte UID Changeable 1K S50 Key Fob

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4 Byte UID Changeable 1K S50 Key Fob

Specification

Ordinary card VS Chinese magic card

How to clone card to CUID card on Android?

Apps for China Mifare Key Fob

Specifications

Software

19 reviews for 4 Byte UID Changeable 1K S50 Key Fob

Q & A

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