Many iPhones users are reporting that the backup portion of syncing in iTunes is taking a very long time to complete or results in a non-responsive iPhone. In some cases, the inordinately long backups may be the result of corruption issues that may be resolved via the following process:
- Allow a backup to complete
- Unplug your iPhone
- In iTunes, navigate to Preferences > Syncing (under "iTunes" on the Mac and under "Edit" in Windows) and delete all old backups
- Restart your system.
- Plug your iPhone back in, at which point you should be prompted to sync with the computer
If your iPhone is non-responsive, you will need to put the device in recovery mode before attempting the aforementioned process. To put the iPhone in recovery mode: First-generation iPhones disconnect it from your Mac or Windows computer then press and hold the sleep/wake and home buttons simultaneously for about 20-30 seconds, until you see a yellow triangle with an exclamation point in the middle accompanied by the text "Please Connect to iTunes." or a picture of the iTunes icon with a USB cable pointing toward it.
iPhone 3G Press and hold the sleep/wake button until the screen goes black (but before the Apple logo appears). Plug the iPhone into your computer and hold the Home button down.
Users are also receiving messages regarding corruption and an inability to restore backups to the iPhone.