Technobabble

iTunes Wi-Fi Sync issue with Phone 4, iPhone 4S, and iTunes 10.5+

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Have you recently updated your iPhone to iOS 5.1.x or had to replace the hardware only to discover that Wi-Fi Sync no longer works? Well that is exactly what happened to me and I have found a solution.

There are multiple guide to do the basic troubleshooting or configuring iTunes Wi-Fi Sync including Apples steps located here: http://support.apple.com/kb/TS4062
If you followed those steps and it still does not work, here are the other options that have helped me fix the problem.

Symptoms:
While iTunes is open and your iPhone is configured for Wi-Fi Sync, your iPhone “Sync Now” button is not greyed out (Settings > General > iTunes Wi-Fi Sync) but when you press the “Sync Now” button, it says something like looking for “<ComputerName>”, cannot find “<ComputerName>”, or Sync will resume when “<ComputerName>” is available.

There are a couple of additional steps that you can take that should clear this up prior to a trip to the genius bar:

  1. Reinstall the newest version of iTunes. Reboot your computer. Do not open iTunes. Then download the file from Apple (http://www.apple.com/itunes/download) and install* over the previous version. Follow the steps on how to setup Wi-Fi Sync (http://support.apple.com/kb/HT1386). Did this work for you? Great! If not, go to step two.
  2. Backup your iPhone and restore it to factory default (http://support.apple.com/kb/HT1766), then try again.

*Note for windows users, you might need to repeat option 1 but by uninstalling iTunes first then doing a fresh install. If you have a lot of data in iTunes, I would likely go to the genius bar before this option and then also backup the iTunes database before starting the uninstallation.

Managing iTunes library, for your reference:
iTunes: Back up your iTunes library by copying to an external hard drive.
http://support.apple.com/kb/HT1751
iTunes: How to re-create your iTunes library and playlists
http://support.apple.com/kb/HT1451

PS- This worked just fine for Jailbroken iPhones.

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