Over time, the jack and plug have spawned different ... it was common to see a third ring to handle stereo audio. At first, the stereo plugs were given a sharper tip so it would be possible ...

It has become difficult to find a flagship phone in the US with a headphone jack. The old 3.5mm plugs seem to be déclassé ... If you've made peace with the wireless audio future, you can expand ...

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 ...