I have tried everything but continue to get this message and am unable to sync my iPhone. It is a 4s 32 gb and i am using the the original cable (and have also used the original cable for my iPad - which works for the iPad but not the phone). To make matters worse, I am not a 'techy' person and only know enough to make me dangerous!!! I can charge the phone and have tried a few basic things that were suggested by others and nothing seems to work. Someone suggested a problem with the drivers??? Any suggestions?
Also, occassionally I get a message about the USB has malfunctioned! I have 4 ports and it makes no difference which one I use. don't get that with the iPad - only the phone.
LizzieB423, thanks for doing your best to resolve this issue on your own. Have you checked the available storage space at iCloud? If it is full to capacity, then you will be unable to sync your iPhone. You may check the storage in Settings>iCloud>Storage & Backup>Available.
If the iCloud is full to capacity, then you may need to delete any unwanted applications, text messages, e-mails, music, notes, and files. Once you have done this, then try to sync your device again. Keep us posted.
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I had this problem for several months until today. Try downloading the iPhone Configuration Utility program from Apple. Run the program then connect your iPhone, ICU should recognize it and your iPhone should start charging. My wifi-sync had also stopped working so I haven't had any new music on my phone in forever!