Hi ! suddenly the proximity sensor of my N9 has stopped working i.e the screen remains on while making the phone calls. The automatic display brightness is working fine though. I have tried reseting and flashing the phone but the problem is still their. Also i am using it in India and their is no official support for the phone. Can anybody help what can be done in this . thanks

It's normaly caused by a screen protector covering the sensor find the sensor and try removing the screen protector from there it's due to a very sensitive sensor.