Is it 1k card (1 kilobyte of user memory)?
Does it have 4 byte UID (not 7)?
Both yes? Then you can clone it to xM1.
flexDF (same as other DESfire implants) is not supposed to be used for cloning.
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If you follow this How to share NFC chip data via TagInfo app
and post the results , we maybe able to answer that for you…
Yes and yes
Thank you very much