If your iPhone 6 Plus 5.5" Inch cannot be charged via the USB charging port, this OEM Replacement Charging Port Headphone Jack Flex Cable with Mic may be helpful
It can also be used for replacing your broken, cracked or non-working earphone jack flex cable
Comes with microphone: can solve the problem of unsuccessful transmission of your voice to the other side of your phone
http://www.hytparts.com/005147-oem-replacement-charging-port-headphone-jack-flex-cable-with-mic-for-iphone-6-5-5-inch.html
