PM3 Commands Reference (Iceman Firmware):

Main Help

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Current command:
hf 15 passprotectafi --help

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This command enables the password protect of AFI.
*** OBS!  This action can not be undone! ***

usage:
    hf 15 passprotectafi [-h] -p <hex> [--force]

options:
    -h, --help                     This help
    -p, --pwd <hex>                EAS/AFI password, 4 hex bytes
    --force                        Force execution of command (irreversible)

examples/notes:
    hf 15 passprotectafi -p 00000000 --force