My iphone 5 is jailbroken on 7.0.4. I have a Mophie Juice Pack Air that I use as my regular case and both the phone and the case charge fine as long as I use the original micro usb cable that came with the case; however, that cable is not even 3 ft long and I need a longer cable. I had a longer micro usb cable from Monoprice so I tried that. It worked for a few days but then I got a "This accessory may not be supported" message and the phone and case wouldn't charge while using the Monoprice cable. I then ordered a different micro usb cable made by Mediabridge and had the same issue. I called Mediabridge to see if they could help me and they recommended that I order one of their usb extension cables and use that along with the original mophie usb cable. That sounded like a good idea to me, but I'm still having the same issue. I'm not sure what is going on here but clearly there must be something (a chip?) in the Mophie micro usb cable that allows it to work without getting that message. What I'm wondering is if there is any type of jb hack that will allow me to use a micro usb cable other than the Mophie one. I'm guessing that there isn't but I can't be the only person having this problem.