I have searched through this forums and google but couldn't really find a matching discussion even though I can't believe I'm the first one that discovers this. Please don't hit me if I missed a duplicate of this.
I'm using a prepaid SIM card with my N900. To check the available amount of money left on the card I have to dial *100# and wait for a service message reply. The N900 seems to be the first phone I own that does not support this (Yeah! On openmoko it works :P ). It rejects the call with the message "Wrong number".
However, this doesn't seem to be an issue only for prepaid SIM cards. My previous SIM coming from a contract used for example *123# to set the current active device in a Multi-SIM setup.
Is there anything known about this issue? Or is there a bugtracker where I can file this?
Technically the Nokia phone stack allows you to call these numbers, but the user interface (the caller application) disallows it. The problem is, that some of these *# numbers are not voice calls, but they send some text to your phone and Nokias phone stack can not yet handle these "text calls".
Gladly, they are working on a solution :-)