I have a strange problem with my N900 which suddenly started after I returned from abroad.

When i try to open an unread message, I get a yellow ribbon saying that the message had failed to deliver to that number and then automatically my phone starts dialing that number. Also I cannot send any new SMS.

In the setting SMS center number is used.

I have PR 1.2, I did installed few applications from extra-devel.
I tried to reboot many time, change the SMS center number but it doesn't help.

Any Idea what is troubling my phone