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mad at auth.se mad at auth.seOn Sun, 30 Jan 2011 19:32:04 +0100, Steve Markgraf wrote: > Hi again, > > On 30.01.2011 19:05, Steve Markgraf wrote: > >>> In gsm 04.08 9.1.22.3 it says "The Mobile Identity 1 and 2 IEs >>> shall not >>> refer to IMEI.". So a standard compliant network should never do >>> that. > >> "The reason why you see paging by IMSI in real-world GSM networks" > > Sorry, I confused IMEI/IMSI. Forget about my last message, although > Haralds blogpost may still be interesting in the context of this > thread. > No, you were right about that, second part of my post was about imsis on air. I already had read Haralds post but I'm not fully convinced of all of his explainations. At least not on modern state-of-the-art core networks. Too less ram or volatile storage on restarting VLRs, is that really still an issue there? The third point, that expired tmsis on unreachable phones with a fallback on imsi paging as the main cause sounds much more convincing to me. But as David pointed out, 10-25% imsi paging is a lot, even about constant 2-5% as I observed are much for a location area or whole msc area. Did anyone do some research on that? Regards, Mad