If you own an iPhone (or any smartphone, really), chances are you use it to some degree to listen to music, whether that be your music stored on the device, or through apps like Pandora, Rdio, etc. And those of us who listen to a lot of music generally like it to sound as good as possible. The problem with that is that most people never upgrade their earphones/headphones past the freebies that are included with their device. Well, to give music lovers an entry level upgrade option, Jays recently introduced their new a-Jays One+ earphones. How do they perform? Our friends over at MobileFun sent us a pair to take a look at. Jump past the break to find out more!