I might be wrong, but AFAIK, NFC is only possible if the 2 NFC enabled devices are within close proximity of one another...as in 5 cm at most.
I would also recommend getting headphones with a mic attached. Personally, for me, Hangout, Skype and taking phone calls with my headphones is becoming the norm.
On Iphone 5S so no nfc anyway, don't really need mic as its mainly for gym.
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