One of my n900 has some problem.

I cannot receive calls and call. It just says “call not established”.

I have changed sim card and gives the same error.

Btw I flashed it to see if I it was a soft error, it keeps doing it.

The strange thing is that it can send sms and receive them as it can receive data via gprs/3G.

Did someone had the same issue?

Regards.

I had the same issue, coupled with this. A reflash fixed it. You may need to reflash both fiasco and vanilla.