A number of iPhone users updating to the latest firmware version (2.2.1) have reported issues when syncing an iPhone or iPod touch to iTunes. Apparently, iTunes quit unexpectedly when the user would attempt to sync. Apple has seemingly isolated the cause of the problem affecting a limited number of iPhone / iPod touch users.
If you have experienced this issue, please follow these steps in order to sync your iPod or iPhone with iTunes:
1. Launch iTunes
2. Select “Deauthorize Computer” from the Store menu
3. Enter your iTunes Store Account ID and Password, then click the Deauthorize button
4. Next, choose “Authorize Computer” from the Store menu
5. Enter your iTunes Store Account ID and Password, then click the Authorize button
Once you have successfully deauthorized and reauthorized your computer, you should be able to sync your iPod or iPhone to iTunes.
Tags: iphone, iPod touch