None of Apple's standard charging/sync cables will work with the X305. You have to use the cable that shipped with it from Alpine. I think it's similar to a KCU-440i, but I can't find one anywhere to get a second one as a backup (mine is wearing with age and gets finnicky in the Maine winter weather). It hasn't been made in a long time and no reputable dealers like Crutchfield carry it, nor does Alpine's online store. I've bought several on eBay and all have been cheap Chinese knockoffs that won't work. Also, the newer KCU-445i won't work either as it's more or less a standard charging/sync cable. But, if you can find that 440i cable somewhere, and then use Apple's new 30-pin to Lightning adapter, that works with the iPhone 5. I had to reset both the phone and the head unit to get them to communicate, but I've been happily using it for a few days now without any issues. Works just as good as the iPhone 4 did. :-)