my iphone won't charge

Thanks for sharing.

My iPhone will charge while using the 12 volt DC adapter while driving but won't charge using the USB port on Macbook Pro or using the AC power adapter. I'm taking it back in to Verizon.

Assuming there is a completely different cable and dock connector invovled with the car adaptor, that would lead me to believe it is simply a defective sync cable. Take it to Apple for a replacement.

No US carrier provides hardware support for Apple products.