today I've made some testing - plugged S2 stock headset to my i8910 - it was going crazy, started calling ppl on its own, couldnt hear music well
amused with it, i started digging, and it appears the pinouts in S2 were changed to iphone standard versus all previous Samsung phone models (used to be nokia standard) - even galaxy s source: http://forum.xda-developers.com/show....php?t=1072491
the difference between those 2 standards wiring in 4 pin 3.5mm plug - pinouts 3 and 4 are switched. In other words Mic line is replaced with Ground line.
If anyone of you got old iphone headset (one with mic) could you plug it in, make a call, try listening a song and confirm it please?