3.5mm is an output port, then how does “play/pause” button signal sent to phone?

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sorry i meant play pause button of connected earphones.

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Anonymous 0 Comments

Look at the jack and count the number of metal segments. The plastic rings separate the segments. Typical headphones has 3 segments – left, right, and ground. Headphones designed for phones have 4, with the extra mainly for the microphone. There is an input using this 4th piece of metal on the jack.

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