Ok so just recently my iPhone 4 has been acting up and I'm stumped. My iPhone is not recognized by any PC (my desktop and laptop as well as a friends PC) and also not recognized by my Pioneer head unit in my car. It will not charge when connected to anything unless its directly in to the wall outlet. My gf's iPhone 3g and her niece's iPhone 4 both hook up just fine on the same PCs and my iPod works just fine on the head unit in my car. I try getting it into DFU mode and it will not do it. It just turns off completely. I can get it into the screen where it says to connect to iTunes but it still isn't recognized. *Clearly this is something that is wrong with the phone. Before anyone mentions that I might not be doing it right to get it into DFU mode please know I have done this dozens of times to JB my phone and other ppls phones easily. I can do it on my gf's 3g with no issues either.* Something that I should mention that may have caused this is that the last time I synced my iPhone to my PC I got a text message in the middle of the sync process. That is the only thing I can think of that may have caused this issue. If anyone has any other suggestions or solution I would greatly appreciate it.