Some manufacturers opt for placing a 3.5mm audio jack on this remote control instead of directly on the phone itself. The reason for this is that 3.5mm jacks take up quite a lot of internal space ...
Clean the audio jack. A dirty audio jack cannot make proper contact with the wired audio device resulting in loss of sound in the form of static noise. Check if your audio jack is corroded.
The 3.5mm headphone jack is an industry standard audio plug. Most commonly used for connecting a pair of stereo headphones to your smartphone or 'piping' your audio from your phone to an external ...