On Sun, 30 Jan 2011 03:42:43 -0800 (PST), Bogdan Alecu wrote:
Hello, I noticed that when I start the mobile application, after the phone chooses a specific channel I get different messages regarding IMSI saying that it's not for us. What are these messages? Phones that camp on this channel? If so, I tried turning off/on a phone from the same operator but I can't see my IMSI showing up.
These are paging requests for phones in your location area. As osmocombb receives them and checks them for its own imsi/tmsi, it discards those ones you observed. The imsi of your other phone should not ever be seen on the paging channel as gsm trys to avoid sending out imsis as much as possible. Instead the network attaches a tmsi to the imsi on your phones first network login (location update) and uses that from there on for addressing the phone. This tmsi is kept by storing on the sim card even over powercycle.
Regards, Mad