Samsung's new flagship smartphone isn't having the smoothest of beginnings. The strange ROM that cropped up a few days ago turned out to be an isolated incident, but now the forums are abuzz with an audio issue that looks a lot more serious. Essentially, the handset's volume control appears to have a mind of its own, flitting randomly between mute, full blast and everything in between. The problem has so far only been observed on European phones using the GSM 900MHz band, and it's exacerbated by the cellular modem either boosting itself in a low reception area or switching between 2G and 3G connections. A user poll over at the XDA Developers forum suggests around 60 percent of owners have experienced the fault. There's a video after the break, complete with a disappointed kid in the background bugging his dad for answers.