Few days ago, I am in a need of IMSI of my SIM card. If you'd like to know what is IMSI, see this. So, i build a small Symbian based application, compatible with S60 2nd FP2 (haven't try it on other version).
Just install the following app, and open it. There are only two function, ie; getting IMEI and Phone model and getting IMSI number. Hope it helps.
