Do this one time, and it’s possible for you to go wireless every time afterward.
If iTunes doesn’t open automatically, open it.
In iTunes, select theiPhoneicon to go to the iPhone Summary screen.

Lifewire
(It’s possible that iTunes will already be on the screen.)
In theOptionssection select theSync with this iPhone over Wi-Ficheck box.
SelectApply, then selectDoneto save the change.

Lifewire
Press the phone icon at the top of the screen.
Then, unplug the iPhone from the computer.
You’ll never need to change that setting on the computer again.

Lifewire
Confirm that the computer and iPhone are connected to the same Wi-Fi connection.
The iPhone cannot be connected to Wi-Fi at work and sync with a computer at home.
On the iPhone, tap theSettingsapp.

Lifewire
Scroll down, then tapiTunes Wi-Fi Sync.
The button changes to readCancel Sync.
Below it, a status message on the progress of the sync appears.
A message displays when the sync is complete.
Tips to Sync iPhone Over Wi-Fi
Syncing an iPhone wirelessly is slower than doing it with USB.
If you have a ton of content to sync, use the traditional wired method.
You don’t have to remember to sync manually.
you’re free to’t change the sync configs on an iPhone or iPod Touch.
That can only be done in iTunes.
Find out how to fix an iPhone thatcan’t connect to Wi-Fi.
Sync iPhone With iCloud
You don’t have to sync with a computer or iTunes at all.
If you want, sync the data on the iPhone to iCloud.
Some people prefer this option.
For others who don’t have computers, it’s the only choice.