None of my headphones/Aux cables would fit in the jack ...
927427
None of my headphones/Aux cables would fit in the jack due to the case except for the standard Iphone headphones. It also charges my phone slower than if i would plug it directly into the wall.
1264897
The ports are too close together, so unless you are plugging in the super-skinny apple headphone plug, the headphone jacks won't fit side-by-side. In addition, the sound is diminished quite a bit.
2996773
If you want to use an aux cable.....good luck fitting it in with the case on
4261022
I purchased these to use with my iphone.  the jack was the wrong size.  i am giving a three becuase I feel it should have been clear in the copy and it was not.  It was too much of a hassle to return.
2828023
Never worked from the moment I took it out of the box. Bought it for an iPhone 4, and the jack seemed to fit nice and snug, but no sound ever came through the earpiece. Just for kicks, I called my girlfriend's phone, and when I spoke she could hear me, but I couldn't hear her. To see if the problem was related to the iPhone, we plugged the handset into her phone, a Motorola Droid 2, but same problem occurred. I Googled the item, which is obviously what I should have done before I bought it, and several people seemed to have the same problem of sound going through the mouthpiece but not coming through the earpiece. In short, a dud.
4450644
The aux cable did not fit thru the port with the case. I removed the bottom piece in order for the cable to fit and then lost the bottom piece of the case. Didn't expect that but it happens.
1276509
One branch of the splitter will not play sound, checked the headphones and it is definitely an issue with the splitter.
4169812
The case arrived looking like it was going to snap in half on the bottom piece.  My husband glued it back together and clamped it and now it is fine.  Now the problem is that I can't get it off because it is too snug.  Why do I need to get it off?  Because I can't plug any headphones/AUX cord into the jack, thus making listening to music at my desk or in the car useless.  Did you even try and plug anything in once you finished the design?
3080497
The headphone jack doesn't work, everything else is fine tho. Will be returning.
2393417
The case did not fit the headphone jack hole.  I had to cut them out with a knife.  But I still use the  case.
4469684
Can't plug in most headphones, and to make matters worse if you take off the case a lot the part around the headphone jack will break.
4369568
The Q has a mini-usb socket, but doesn't support headphones in it!!
1756745
The hole for the head phone AUX jack is not is the right spot and is not easily accessible. I DO NOT recommend this.
4500642
The plugs fit properly in a variety of devices. I have a pair of headphones, for example, where the jack is inset slightly behind a rubber protective cover (why? in case a bug wants to crawl into it?), and my older aux cord has a housing that hangs up on the casing of the headphones. These don't.
2269537
Purchased this to simply extend my standard headphones to reach my new desktop. Female portion fits perfectly in regular headphone jack, but male portion would not receive a headphone plug properly - it would only fit in halfway, resulting in sound only in my left ear. I tried multiple regular headphones, with no luck. It wouldn't even receive it's own male end into the female end, and I broke one set of headphones trying to pull it's plug out of the male portion of this cord (even though it was only halfway in, it was STUCK).
2235304
Aux cord would not work on stereo unless also plugged into to charger at the same time. Tried with multiple phones, same result
1019753
Ok, I'm not that experienced with this sort of thing, but I did manage to solder the headphone wires onto the terminals on this plug, and at that point the phones were working well. The problem arose when I tried to slide the cover over the assembly - it was way too bulky to fit! So I compressed it this way and that until i got it in there, but of course in doing so, the connection was pretty much ruined.