I picked up the E07k to use with my Galaxy S3 (I747M North American version) on Jelly Bean 4.1.2 and it works just fine.
However, I am finding that the sound quality is not as good as I was expecting? The sound is thin and muddy and not too much of an upgrade from the straight headphone out. When I use my E07k (or even E17) as a USB DAC/headphone amp for my laptop it sounds fantastic with either of my headphones. I would think that it is just digital audio data being sent out directly to the DAC, and the E07k is doing DAC and amp it would sound as good as it does going from my laptop? Maybe someone knows why this is the case?