Nokia Versus iPhone Headphones (In)Compatibility

I had bought a lovely pair of Sennheiser MM70i and AfterShokz Mobile headphones. That I would have loved to use with my Nokia.

But the audio is terrible: no bass and the treble is all distorted. Suspecting that the pins must be mapped differently, I went and sought clarification.

Surely enough, Nokia maps the microphone to pin 3 where everyone else (such as Apple) maps it to pin 4.

Check for yourself on the friendly site of on their Nokia page and the iPhone page.

Perhaps this handy adapter will help sort this out. Photo credit goes to AccessoryJack.