if i were you, i will consider also the interface.. I've listened both x3 and e18, in my opinion sound is better with e18.

Bad news: also with Android 4.4.2 Nexus 5 didn't work with Fiio E18. The DAC ricognize the phone, but music is played through Nexus speaker, and It doesn't come any sound through the headphones. Sorry for being late with my answer

Sorry, i'll try today.

Today i'll try with my brother's Nexus 5!

Thanks! What Android's version did you had before update?

I'm in your same situation. I don't think that the processor is the matter: my galaxy S2 works very well after two years. Now i haven't got so much money to spend in a new smartphone so i listen high quality music only with my pc. But if you would buy a new phone, take a look at amazon, where...

That's a bad news. In any case, thank you very much for your support! ;)

Do you know if there is any modded kernel for the S2 that supports USB isochronous transfer feature?

I've tried yesterday USB Audio Player Pro, but it didn't work unfortunately.. Now i'm trying to install an android 4.4.x ROM, and i'll tell you if it works. I don't have so much hope... ;)

there isn't any problem for using others otg cables. They are the same, no differences

P.S. your galaxy S with Android 4.3 didn't recognizes the device, right?

This is a very bad news... Now i'm using E18 with my PC, but i think i have to buy a new phone... :( I'm not sure that installing a 4.3 rom it does work... but maybe i'll try tomorrow...

@carpler i've tried S3 Mini, it didn't recognise Fiio E18 (red light). In Galaxy S2 regognises it (pink light) but did'n make any sound...

My Galaxy S2 recognises the device, but i can't hear any sound. Play/pause-forward-back are working correctly, but no sounds came out...   @carpler, my father's got an S3 mini, i'll try for you!

Hi James! First of all, how are you? Today afternoon i'll try the E18 with my galaxy s2.. Hope It works..