iPhone sync with iTunes on wifi

Sync your iPhone, iPad, or iPod touch with iTunes using Wi-Fi

Open iTunes. Make sure that you have the latest version.
Use the USB cable that came with your iOS device to connect it to your computer.
In iTunes, find and then click your iOS device.
On the Summary tab, select “Sync with this [device] over Wi-Fi.”

Click Apply, then disconnect the USB cable.
Choose which items you want to sync, then click sync.

When the computer and the iOS device are on the same Wi-Fi network, the iOS device appears in iTunes. The iOS device syncs automatically whenever it charges and iTunes is open on the computer.

If you can’t set iTunes to sync over Wi-Fi, or if sync doesn’t work:

Restart your computer and iOS device.
Make sure that your computer and iOS device are on the same Wi-Fi network. Syncing doesn’t work over an Ethernet to Wi-Fi connection.
Check your firewall settings. If you use security or firewall software on your computer or router, you can get help with security software. You can also contact the router’s manufacturer or check the documentation to