Thank you all,
I forgot to mention that I was trying OpenSC with OpenGPG card.
I can use GPG, but I want to try with OpenSC because I have plan to 
develop OpenSC :).

On Sat 21 Apr 2012 05:52:17 PM ICT, Peter Koch wrote:
> Hi Nguyễn Hồng Quân
>
> Since you are trying to change the preferred language with a
> PUT DATA command I assume you are using an OpenPGP card
>
> OpenPGP cards use ASCII coding of PINs so the correct APDU
> to verify your admin PIN (assuming its value is the default 12345678)
> is
>
> 00 20 00 83 08 31 32 33 34 35 36 37 38
>
> How about using gnupg and the "gpg --card-edit" command? Would
> be much easier than using PUT DATA apdus in opensc-explorer.
>
> Peter

--
Regards,
Quân
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