Dual Format Frequency T5577 & UID Block 0 Changeable Card
Dual Frequency T5577 & UID
- Dual Format. Two Chips & Antennas inside each card.
- Use ProxMark3 (Magic Chinese Guy function) or libnfc to change UID.
- Uses "backdoor" technique to change/rewrite UID.
- UID can be changed multiple times.
- Improved High Stability Key Fobs
Please note: Weak and poorly constructed antennas can cause the card to permanently lock. Please make sure antenna is well tested and all surrounding EMI sources are turned off. If you are using a cellphone NFC chip please make sure that your cellular, WiFi & Bluetooth functions are all turned off before communicating with card. The card is tested and pre-programmed with a custom UID. If this card cannot revert back to the pre-programmed UID it is considered locked and not returnable. We do not provide technical support for this product.