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David A. Burgess dburgess at jcis.netHarald - Thanks for the list. We'll try to find one of these. I have a few iPhones sitting in front of me, but unfortunately they are all 850/1900 and my available hardware is 900. :( Does you have an example GSMTAP/PCAP trace of a successful PDP context activation using OmsoSGSN? That would be useful for comparison. (And do you find the GPRS L3 & SNDCP decoding in the current Wireshark 1.7 to be reliable?) -- David On Dec 14, 2011, at 1:36 AM, Harald Welte wrote: > Hi David, > > On Tue, Dec 13, 2011 at 09:37:19PM -0800, David A. Burgess wrote: > >> Can someone recommend a good smartphone for testing with OsmoSGSN? We >> are having trouble getting our GPRS modem to recognize a ACTIVATE PDP >> CONTEXT ACK message and are trying to determine if the error is in the >> modem, in OmsoSGSN or somewhere in between. > > I've successfully used at least SE K800i, Google Nexus S, Dell Streak, > HTC Hermes II, Motorola A780 here on my side. I know some other people > have been using OsmoSGSN/OpenGGSN for iPhone related work, though I > don't know which particular model they've used. > >> Better yet, is there anything out there that can generate an L2 or L3 >> trace, like the Nokia 3310, but for GPRS as well as GSM? > > The only ones that come to my mind are the TEMS variants of the K800i, > but those are of course hard to come by and/or expensive :/ > > Have you considered using Luca's work on gprsdecode? This way you could > do an air interface trace of what's happening between BTS and MS. > > Regards, > Harald > -- > - Harald Welte <laforge at gnumonks.org> http://laforge.gnumonks.org/ > ============================================================================ > "Privacy in residential applications is a desirable marketing option." > (ETSI EN 300 175-7 Ch. A6)