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Dieter Spaar spaar at mirider.augusta.deHello Andreas, On Wed, 20 Jan 2010 09:30:17 +0100, "Andreas.Eversberg" <Andreas.Eversberg at versatel.de> wrote: > > some stupid question: if a phone does not support any encryption, is it > possible to use it on an official GSM network? (authentication works, of > course) if so, what phone might it be? I did a quick check, at least Vodafone and T-Mobile here in Germany reject the Location Update Request with "Network Failure" (0x11) if they get a classmark without any encryption available. The registration works with the same phone if the classmark indicates that encryption support is available. The test was done with a phone where I can modify the classmark data. Best regards, Dieter -- Dieter Spaar, Germany spaar at mirider.augusta.de