I am having a problem with my phone... when i connect headphones(any headphones) to the 3,5mm jack and play audio, there is a tiny high frequency noise in the background. However, this is only present when there is sound playing.. if i stop playing sound the high frequency noise stops after a few secconds... I am thinking that it must be the processor of the phone generating the noise, and the sound card is not filtering it out...
The cellphone is an LG Optimus 4X HD
