Seeking Advice or Resources for Cloning HF RIFD fobs/card

The t5577 is a very capable chip and can emulate many common cards, but there are still some rarer LF (125khz) tags that it won’t be able to emulate

13.56mhz mifare is a broad category, so you will need to narrow it down a little more to figure out a chip that will work for you, this may be a good place to start for iClass chips:

Plus a PM3 primer:

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