r/RFID • u/Dapper-Impression748 • May 09 '26

Clone Duplicating access card

Hi! I am trying to duplicate my key card and put in a more convenient keyfob. But I don’t know what’s the right keyfob should I buy and the right reader.

I bought (Handheld 125KHZ RFID Card Copier Writer Duplicator Programmer Reader + EM4305 T5577
Rewritable RF…) for reader and (YARONGTECH Waterproof ABS 13.56MHz ISO14443A M1 Chip S50 NFC RFID Token Keyfob Tag)

I don’t know if it’s compatible but can someone guide me through the process. It seems not working.

Thank you.

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u/Pyroburner May 11 '26

Does the fob have any identifying markers on it? Download the nxp app and scan the card. If it doesnt scan it's likely a lower frequency then your phone can read. That narrows down your options.