Hi Kathryn, On Wed, Sep 27, 2017 at 05:37:36PM -0400, Kathryn Heckman wrote: No, that defeats the entire purpose of having card-individual OPc values. If you could just revert that operation, there would be no [security] advantage of card-individual OPc values over a global OP value, and hence that entire option could be dropped from the specifications altogether. Regards, Harald -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

On 9/27/17, Kathryn Heckman <exuberant.kathryn.heckman(a)gmail.com> wrote: Someone please correct me if I am wrong, but I would assume that having exceeded the number of attempts to enter the ADM1 key means that the USIM is bricked beyond recovery. But the sysmoUSIM cards sold at shop.sysmocom.de are fairly inexpensive for a pack of 10, so a bricked (U)SIM shouldn't be too big of a tragedy - or is there another dimension to this problem which I am missing? If you are anywhere near local to me (California, USA) I could give you one of my sysmoUSIM cards, but I am guessing it probably won't help you as I bought the cheaper version without the ADM1 keys - for my application (production testing of my GSM MS hardware) it doesn't matter what the programming of the (U)SIM happens to be. M~