Thats realy awful!
The List of Headphones in this Forum has this sentence in Partly working Headphones:
Continuing the discussion from 
List of compatible Headphones and Headsets for FP2:
the full listitem:
Apple Earpods with remote and mic18 Corded in-ear. Sound out is fine, Buttonclick pauses music, but mic does not work. Tried 2 sets. Worked including mic on FP1.
I doupt that that is true. Can somebody check?
Regards, Novski
edit:
maybe this has to be worked over as well:
Continuing the discussion from List of compatible Headphones and Headsets for FP2:
[quote=“Douwe, post:1, topic:12268”]
Working hypothesis, waiting for an official statement:
FP1 uses OMTP (ground=1)
Official statement (01. Feb 2016):
FP2 uses AHJ=CTIA (ground=2)
A possibility is to use an adapter, e.g. this73.
Drawbacks:
more china-stuff has to be bought, remote buttons could stop working,
price (in my case again the same money as the headset did cost)