I have noticed that my X10 mini pro makes a quiet buzzing or clicking noise whenever anything on the screen is updating. This is some sort of electronic noise, and it isn't a sound effect that's switched on. For example, if I scroll a menu, list or web page, I hear it while the image is scrolling. If I press the home button, I hear the sound while the screen is changing. If I start the camera, I hear a continuous clicking while the live view is active. And if I use the stopwatch, I hear a clicking noise. I wondered whether others could check to see if their phone does the same. Note that it is rather a quiet sound. You need to be in a quiet place and possibly to hold the phone closer to your ear (depending on your hearing) in order to hear the noise. To test this, I suggest going somewhere quiet, then starting the camera and holding the screen to your ear. If this is simply a "feature" of the phones, I can live with it, but if it's a fault, then obviously I'd like a replacement. However, I need someone with a similar phone to confirm it one way or the other, as trying to ask anyone at Sony Ericsson is useless!