Nevertheless, I have the headphones returned. The sound quality is so bad that I have willingly preferred to hear any more music after a few minutes, instead of harming me. Absolutely no comparison to the originals (where I had gone now a broken after 7 years), the sound 20 times better.
The remote control works on 3G is limited: You can pause the song and also before and turn back, however, has no control over the volume. Because simply nothing happens.
Unfortunately for the 3G in particular, due to the sound quality ne at all recommended. Pity!