IPhone charging cable not supported but still charging?

I have a genuine Apple cable that came with my iPhone 6 (updated to the latest iOS). It fully charges up but when it gets to 100% I get a message that says "this accessory may not be supported". I don't see any damage to the cable and I have only had it a couple of months. Not sure whether to just ignore it or not?

Windows 7 Laptop will not import iPhone 3GS photos, but imports videos?

I tried to import photos and videos from my 3GS using the import photos button built in to Windows 7. For some reason the photos will not import when I try, but the videos will. I get the message "The following error occurred while importing IMG_0003.JPG: The system can't find the path specified. What do you want to do? Try again, Skip this file, Skip all files with errors."

The phone was unlocked and it still did not work.

What happens when you hard reset iPhone that's blacklisted?

Found a iPhone 6 today at the train station ran a imei, actually found out the phone was reported lost/stolen, but the phone is on the lock screen. But "find my iPhone" is not on and is blscklisted for T-Mobile and metropcs & was open to other carriers. Most likely doesn't have I cloud But my question is what would most likely happen if hard reset this with iTunes. Would it be like as it was brand new