PM3 Commands Reference (Iceman Firmware):

Main Help

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Current command:
hf mf gen3uid --help

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Set UID for magic Gen3 card _without_ changes to manufacturer block 0

usage:
    hf mf gen3uid [-h] [-u <hex>]

options:
    -h, --help                     This help
    -u, --uid <hex>                UID 4/7 hex bytes

examples/notes:
    hf mf gen3uid --uid 01020304             -> set 4 byte uid
    hf mf gen3uid --uid 01020304050607       -> set 7 byte uid