Ordered a 3 pack of USB cable cables from amazon. Two of the 3 say pop up a notification of an incomplete connection when plugged in. They still charge I guess. I'm using these in vehicles, so it's a variety of charging sources. The factory cable that came with the phone gives no such wanting, neither does the USB cable adaptor that came with my phone. My question is, is it still OK to use these cables? What exactly does it mean?