Current command:
hf mf gchpwd --help
Change access password for Gen4 GTU card. WARNING! If you dont KNOW the password - you CAN'T access it!!! usage: hf mf gchpwd [-hv] [-p <hex>] [-n <hex>] options: -h, --help This help -p, --pwd <hex> password 4 bytes -n, --newpwd <hex> new password 4 bytes -v, --verbose verbose output examples/notes: hf mf gchpwd --pwd 00000000 --newpwd 01020304