0xE8000023 error really did trouble me.It is the error message which iTunes report of while trying to sync your phone. At one point I convinced myself that I bricked my device but somewhere in my mind, I had a feeling that I could overcome it. After hours of restarting my phone and trying to sync the iPhone with iTunes with the sync cable, I thought going to an Apple store will be my last resort. Then I came home, tried one last time with the dock this time and Voilaaaa, it worked!! So, the workaround is syncing the iPhone with the bundled iPhone Dock!!