GeZhi Electronic Co.Ltd.

GeZhi Electronic Co.Ltd.

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Contact Us

Name: Michael
Tel: +86-13113330725
Fax: +86-13113330725
Mobile: +86-13113330725
Add: JinKe industry DaShi PanYu District GuangZhou City China
Skype: gezhitech007
QQ: 1074079485
MSN: SKYPE: gezhitech007 QQ: 1074079485

UID changeable 1k S50 keyfob(10pcs)

UID changeable 1k S50 keyfob(10pcs)
Product name : UID changeable 1k S50 keyfob(10pcs)
Item : UID-changeable-mifare-1k-S50-keyfob
Price : 26
Details :

uid changable 1k S50 keyfob(10PCS)

 Price: $26 US Dollar for 10PCS




It is used as a s50 card, it has backdoor to change the uid of the card.

you can use libnfc' command nfc-mfsetuid to change the uid of the card

see here:


Change the uid with proxmark3

use hf mf csetuid xxxxxxxx to set the uid.

all the commands that for UID changeable s50 card:

 1. connect the pn532 board to pc with a ft232rl usb-uart.

 2. download libnfc and compile it. here is howto:




now read the uid of the card, and then change the uid
The uid is 01020304, and we set it to 33333333.

read back the uid to see if it is changed


Package List


uid changable s50 card with backdoor keyfob(1k card, s50 card)  x 10


About Shipping


We will dispatch the items when received the payment.

Shipping time and cost(for reference only):
USD8    for   China post air mail:               20 business days or more     
USD28  for   DHL or EMS:                        about 5 bussiness days                     

Express company need the following information to delivery a parcel:

Phone number:
Post code:


Payment Method Accepted

We accept Paypal, WireTransfer and Wester Union payment.
Please contact us for payment.

  Contract us 

E-mail: or
Phone: +86-013113330725

Return & Replacement Terms & Conditions

Buyer can return the item in the original package within 7 days upon receiving if you are not happy with it. We will refund you or send replacement to you within 3 working day after the item is received.