I have some other strange with my phone, it happens now 4 or 5 times, the last 2 times today, I stay in Thailand, my telephone lays on the desk and 2 relatives from me from Europe call me with the question "did you call me?"
The 2 times before it happens that time I stay in Europe, and the same happens, very strange.
I have a Thai prepaid card from AIS, and after the first time it happens I changed the phone because the phone get some problems with the camera.