i wonder how big of a fine you would get slapped with if your ringtone were white noise (static) ... since it contains every frequency needed to produce every song in exsistance...
idk that this applies for other countries but......
3G cell phones operate at a frequency in which they cause interference with pretty much all conventional speaker near by.
usually producing pink and sometime white noise during transmission and reception. If you cant hear it coming out of your phone go near a stereo turn the volume all the way up and then mute it. Send a text and your speakers will make sound due to the board traces picking up the signals and the transistor not being able to switch back fast enough to accurately reproduce them causing it to generate frequencies within the audible range.