Just received my E18 back from Fiio CS, works perfectly now on my HTC One 4.4.2   Turns out it was a very simple error, the USB OTG cables were broken and they were replaced. 

Just got mine in the mail yesterday, came with two USB OTG cords.  Is this normal? Tried one cord, didn't work, tried the other cord, didn't work again, went on a long quest to hunt down the problem on xda and head-fi.  Finally, thought occurred to me to switch the plug around and now USB DAC...

Just got my Fiio E18 in the mail and DAC does not work with the 2 supplied USB OTG cables on my 4.3 Sense 5.0 HTC One. When the USB is connected, I can control the tracks with the outside buttons but the volume goes right to zero. Also, I can't charge the phone using the E18 as advertised...

Hehe technically worth, not even a phrase in my brain when dealing with the finer things in life.

Thank you for the recommendation, wallet already suffers due to my love of custom knives and firearms. I've been reading up on the Schitt affordable DAC/Amp

Hi everyone on Head-Fi.org   I've been lurking on your forum for some time now, it was very handy in helping me selecting a Sennheiser 598.  Now I'm doing more research on a DAC/AMP setup and learning along the way.