How do I build a TRRS headphone jack with a jack that is detectable by an iPhone
You might want to take a look at this and check if you have the same config. 
http://www.wisebread.com/build-a-cable-to-control-your-android-phone-while-you-drive 
I'm sure android and apple are the same kind (I've used them interchangeably) though samsung android phones have two rings swapped.