Problems with earpods (mic&remote does not work)

Hey,

I got brand new iPhone 5 from warranty replacement with new accessories (earpods, lightning cable, apple loader).
Today I've listeting to music and noticed that remote on the Earpods isn't completely work. I called to check the mic on earpods and no response too..
What could be wrong?
This is new phone.. There's no lins, dust in the jack. I've checked carefully.
Music plays good, I hear everything, as before.
But there's no point to use Earpods, while I'm not able to change songs, volume or make voice calls?

What's wrong?
I've restore iPhone (with iCloud backup) and nothing..

Is this a iPhone Jack problem or headphones?

PLEASE HELP!