Hi there! I need the pinout of the Galaxy S3 headset because even though I have other TRRS headsets, none of them seems to fully work with the S3. All the headsets that I have tried work only as headphones, but the headset microphone does not seem to be detected by the phone. I'm pretty sure it must be something related to the resistances/location of the GND and MIC signals, which are not standard across phones.
may be this one ? http://pinoutsguide.com/HeadsetsHeadphones/samsung_i9100_headset_pinout.shtml