If you're having problems with itunes wi-fi sync in iTunes 11, (or below), follow these tried and tested steps. Not e that you should have the following:
1. Laptop having Windows 7
2. iOS Device running iOS 5
Below are the steps to ensure wi-fi sync works.
1. Connect your iPhone/iPad with USB cable to Computer where itunes installed.
2. Click on the "device" icon in itunes, & in "Summary" Page, ensure you have enabled the option "Sync Over Wifi My Ipad / iphone"
3. Disconnect the Cable,
You should now be able to see your ipad in itunes. if not, follow the below steps
4. Enable Upnp in your computer.
5. This link shows you how to enable upnp in Windows 7/ Vista/ XP. --> http://www.computerhope.com/issues/ch001367.htm
6. Restart your Computer
7. Ensure SSDP service is running in Automatic mode. Learn it here --> http://en.kioskea.net/faq/20880-windows-7-disable-the-ssdp-discovery-service (Just click automatic instead of disable)
8. You should also ensure upnp is supported in your ADSL or Wi-Fi router.
9. IN your router, under LAN settings (Advanced), there will be option of Upnp, enable this. Even if it is enabled, disable & enable it. Restart the router once.
Note: The Upnp & SSDP would take 10 minutes to discover the device. Be patient.
Open iTunes & Power on your ipad, you should be able to see the ipad in itunes now. if not,
10. Close your itunes & power off ipad.
11. Restart the service called "Apple Mobile Device",
Open iTunes & Power on your ipad, you should be able to see the ipad in itunes now, if not.
12. Disable Firewall & IPS in your Network Connections. Disable built-in Firewall & IPS in Virus Softwares. Ensure TCP ports 123 and 3689, as well as UDP ports 123 and 5353 are allowed. Refer to this link for more inputs --> http://support.apple.com/kb/TS4062.
13. Close your itunes & power off ipad.
14. Restart the service called "Apple Mobile Device",
Open iTunes & Power on your ipad.
This should be working now for sure shot. . I bet.
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