When "iPhone won't sync with iTunes" issue results from certain iPhone system failures, maybe the above methods fail to work. Hence, it is recommended to apply an iPhone issue repair tool - Joyoshare UltFix iOS System Recovery to thoroughly kill off the issue. Joyoshare UltFix is so powerful that it can have over 30 types of iOS problems settled without much effort. Else, it offers users a free and flexible option to make their device get into/out of recovery mode with one click.
Not surprisingly, the repair program has the capability to repair problems with two modes - standard mode and advanced mode on iPhone/iPad/iPod touch even Apple TVs. Concretely speaking, standard mode is aimed to fix common issues like iPhone computer not recognizing iPhone, iPhone is disabled connect to iTunes, iPhone stuck in iTunes logo, and more with no data loss during the whole process. Advanced mode works the grave iOS problems by restoring the device. To fix your problem, just choose the standard mode.
Key Features of Joyoshare UltFix iOS System Recovery
Fix iPhone won't sync to iTunes issue without losing data
Designed with user-friendly interface and easy to use
Support all iOS devices and the newest iOS version