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Andrew Back andrew at carrierdetect.comHi Dieter, On 12 November 2012 12:39, Dieter Spaar <spaar at mirider.augusta.de> wrote: > Hello Andrew, > > On Mon, 12 Nov 2012 10:25:19 +0000, "Andrew Back" <andrew at carrierdetect.com> wrote: >> >> I'm trying to get some MS test equipment working and have programmed a >> SIM with pysim-prog.py, but the tester has a configuration field for >> RAND and I cannot see how to set this on the SIM. In fact this has >> confused me as I thought the network always supplied this... > > Most certainly the RAND value of your MS tester is the value which > is sent during authentication. All MS testers I have seen so far > allow to configure this value, either use random data or set it > to a fixed value. Right, so I'm now thinking that the tester UI and documentation is probably just unclear/misleading. >> I have the IMSI, Ki, MCC and MNC set the same on the tester and SIM, >> but tests don't get very far and fail with "incorrect SRES". > > I would expect that you need a SIM card which supports XOR for > A3/A8. This algorithm is the only one I have seen on nearly all > MS tests sets I have access to. Those test sets usually don't > support COMP128 and its variants (I guess your SIM card only supports > this algorithm), so you need a SIM card which uses the same algorithm > as the MS test set. I've ordered one of those generic test SIMs from eBay and now I just need to wait for it to arrive from China... The description mentioned a number of common testers and so I'm guessing it must support XOR. > However if you can set a fixed RAND value on the MS test set you can > check what your SIM card will return with this RAND and set Kc and > SRES on the test set to those values. I don't see any way to set SRES and Kc in the tester, sadly, so I think I will just have to wait and try with the test SIM when it arrives. Thanks for your help! Best, Andrew -- Andrew Back http://carrierdetect.com