Is this a gen 2 card? Is it writable by Android devices?

This card is 13.56MHz writable UID card, can copy mi-fare IC card, used for access control system. you can use rfid device to program this card.

are they compatible with Isonas?

I am not know too much about Isonas, this card is 13.56MHz writable UID card, you need to guarantee the working frequency of your access control device is 13.56MHz.

I bought this product with the intention of being able to write to sector 0, but i can write to all sectors except sector 0, so i can't change the uid

you need a more powerful card reader.

Lexi 20pcs Changeable Uid Smart Card Rewritable 13 56mhz Rfid

Description

🔑 Unlock the future of smart access with LEXI’s endlessly rewritable RFID cards!

RUGGED READY - Waterproof PVC design with wide temperature tolerance (-40°C to 65°C) for all environments.
SEAMLESS COMPATIBILITY - Works flawlessly with all 13.56MHz door access control systems, ensuring effortless integration.
COMPACT RELIABLE RANGE - Optimized for 0-10cm reading distance, perfect for fast, contactless entry.
ENCRYPTED SECURITY BUILT IN - Each card features a unique, reprogrammable encrypted ID for top-tier access control.
ENDLESS REWRITES LIMITLESS ACCESS - Supports over 100,000 read/write cycles for unmatched durability and flexibility.

The LEXI 20pcs Changeable UID Smart Cards operate at 13.56MHz frequency, compatible with all MI-Fare Classic 1K systems. Each PVC card supports over 100,000 rewrites and features a unique encrypted UID, ensuring secure, flexible, and durable access control solutions for offices, apartments, and more.

Reviews

G**N

Perfect for making Skylanders

These are the cards that work for making Skylanders! Hopefully this helps with anyone searching for the same. :) Lots of trial and error led us here and these 100% work!!

20.08.2025

C**Y

Worked for Android Mifare Classic Tool; Skylanders; Not Rewriteable though!

I've ran into no issues apart from having done a few tests and noticed once it's written, the ACs are not interchangable, I'm not too entirely sure how to change that encoding but be careful when you write as to not duplicate the wrong dump file. The item worked perfectly for me, I just have to be cautious because if I mess up, I lose that card permanently as it becomes locked.

27.11.2024

K**R

Good 5577 cards

The cards work well for my use case. I've written a few of them and re-written them. They seem pretty effective.

15.09.2023

J**R

Worked for me.

I was able to create Skylander cards using these and MWT. Haven’t tried them in game yet but I was able to see them in sky-edit using a portal. If they don’t work in game I will update my review.

13.02.2022

A**R

Shortcuts Compatible

These are completely programmable and Shortcuts compatible. They worked with my NFC/RFID door handle too.

26.03.2023

O**.

Funcionan perfecto

Funcionan perfecto con las cerraduras digitales Samsung. Son reescribibles al igual que las originales.

2.05.2024

H**L

Decent tags

Over all good quality but in my package I got 2 tags are not working.

19.09.2020

J**T

worked great to program and open doors on a RFID reader for access entry at work - CCURE system

worked great to easily program and open doors on a RFID reader for access entry at work - CCURE system

24.03.2023

U**H

Not CUID

Despite what other Amazon review says, this card is NOT Gen 2, and the UID cannot be written using Android MCT! The review claiming it can should be deleted as it is highly misleading

13.04.2025

C**Z

Excelente

Sirve tal cual su descripción indica

29.06.2023

M**E

Uid do not change

These are not UID changeable cards be careful.

28.06.2022

A**Z

Funcional, pero no para todo

Yo las quería ocupar para hacer Skylander Imaginators, pero no funcionan para todas las versiones

20.11.2025

S**A

UID sector 0 is not writable as stated. Don't waste your time!

The UID is not writable for sector 0. The description is very wrong so don't waste your time!

20.09.2025

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LEXI 20pcs Changeable UID Smart Card Rewritable 13.56MHz RFID PVC Blank Card for 1K S50 MF1 Mi-fare Door Access Control Block 0 Sector

Description

Specifications

Reviews

Common Questions