Good afternoon, Thanks a lot you for your answer. I did the test with the PUK code. but it did not work as well (see log below). The Amarisoft SIM card has two PIN codes, I have the following informations on it : - PIN :  1234 - PIN2 : 1234 - PUK : 12345678 - PUK2 : 12345678 I also think that we have the following commands relative to the (PIN) authentication : - change_chv : edit one of the pin codes (specified with the option --pin-nr) - enable_chv / disable_chv : enable/disable the need to enter the PIN to access files restricted by it - unblock_chv :  unblock a wrong PIN code entered more than 3 times with the corresponding PUK code - verify_chv : authenticate the user with the PIN code (specified with the option --pin-nr) I did try to unlock the PIN2 but it did not change anything (get a similar error). Plus if I enter a wrong PIN1 code, the error is not the same and is really clear. pySIM-shell (00:MF)> verify_chv --pin-nr 1 1234 CHV verification successful pySIM-shell (00:MF)> verify_chv --pin-nr 1 1233 EXCEPTION of type 'RuntimeError' occurred with message: Failed to verify chv_no 0x01 with code 0x31323333FFFFFFFF, 2 tries left. To enable full traceback, run the following command: 'set debug true' pySIM-shell (00:MF)> verify_chv --pin-nr 1 1234 CHV verification successful pySIM-shell (00:MF)> verify_chv --pin-nr 2 1234 EXCEPTION of type 'SwMatchError' occurred with message: SW match failed! Expected 9000 and got 6b00. To enable full traceback, run the following command: 'set debug true' pySIM-shell (00:MF)> verify_chv --pin-nr 2 12345678 EXCEPTION of type 'SwMatchError' occurred with message: SW match failed! Expected 9000 and got 6b00. To enable full traceback, run the following command: 'set debug true' pySIM-shell (00:MF)> verify_chv --pin-nr 1 12345678 EXCEPTION of type 'RuntimeError' occurred with message: Failed to verify chv_no 0x01 with code 0x3132333435363738, 2 tries left. To enable full traceback, run the following command: 'set debug true' pySIM-shell (00:MF)> verify_chv --pin-nr 1 1234 CHV verification successful pySIM-shell (00:MF)> ________________________________________ De : benoit michau <michau.benoit(a)gmail.com> Envoyé : samedi 6 juillet 2024 07:14 À : Valentin Maillet (EXT) <Valentin.MAILLET.ext(a)keas-group.com> Cc : simtrace(a)lists.osmocom.org <simtrace(a)lists.osmocom.org> Objet : Re: pySim-shell issues with CHV2 verification (amarisoft sim card)   Hello, Afair, PIN 2 should correspond to the PUK code, which is traditionally 8 digits, not 4. Here, you get an error indicated by the SW code 6B 00, which means "wrong parameters P1 or P2". This can correspond to the length of the PIN 2 expected to be longer than the one you provide. Le jeu. 4 juil. 2024 à 17:11, Valentin Maillet (EXT) <Valentin.MAILLET.ext(a)keas-group.com> a écrit : Good afternoon, I am trying to verify the CHV2 verification on an Amarisoft  Test SIM Card. With a HID OMNIKEY 3121. I have issues with the CHV2 verification with the pySim software and amarisoft simcard. I get the error below. Can you please give me some hints on how to fix this issue as I have no idea of how to start. Sincerely, Valentin M. pySIM-shell (00:MF)> verify_chv --pin-nr 1 1234 CHV verification successful pySIM-shell (00:MF)> verify_chv --pin-nr 2 1234 EXCEPTION of type 'SwMatchError' occurred with message: SW match failed! Expected 9000 and got 6b00. To enable full traceback, run the following command: 'set debug true' pySIM-shell (00:MF)> set debug true debug - was: False now: True pySIM-shell (00:MF)> verify_chv --pin-nr 2 1234 Traceback (most recent call last):   File "/home/keas/.local/lib/python3.10/site-packages/cmd2/cmd2.py", line 2399, in onecmd_plus_hooks     stop = self.onecmd(statement, add_to_history=add_to_history)   File "/home/keas/.local/lib/python3.10/site-packages/cmd2/cmd2.py", line 2852, in onecmd     stop = func(statement)   File "/home/keas/.local/lib/python3.10/site-packages/cmd2/decorators.py", line 382, in cmd_wrapper     return func(*args_list, **kwargs)  # type: ignore[call-arg]   File "/home/keas/pysim/./pySim-shell.py", line 824, in do_verify_chv     (data, sw) = self._cmd.lchan.scc.verify_chv(opts.pin_nr, h2b(pin))   File "/home/keas/pysim/pySim/commands.py", line 693, in verify_chv     self._chv_process_sw('verify', chv_no, code, sw)   File "/home/keas/pysim/pySim/commands.py", line 682, in _chv_process_sw     raise SwMatchError(sw, '9000') pySim.exceptions.SwMatchError: SW match failed! Expected 9000 and got 6b00. EXCEPTION of type 'SwMatchError' occurred with message: SW match failed! Expected 9000 and got 6b00. pySIM-shell (00:MF)>