Take your wire that came with the iPhone and plug it into the USB port, from there it will automatically sync.
Three steps can help you:
Step 1: Run Software, Connect iPhone
Run iPod to iPod Transfer, connect your iPhone to computer.
Step 2: Select the Files from List
In the left panel, you can select the files you want to sync to your iTunes. Click the "Export" button at the top to begin to the transfer. This software also helps you to Transfer Videos from iPhone to Computer.
Step 3: Click Export to Computer
Set things up just as I have shown and that's all there is to it. Choose "Export to iTunes Only" and press the "OK"button at the bottom, the program will start to sync iPhone to iTunes on computer.
http://www.ipodtoipodtransfer.org/how-to/sync-iphone-to-itunes.html
For more details you can see this link.
You can sync your iPhone to iTunes to transport music, pictures, videos, etc.
you need itunes, and sync it on itunes (it says sync ) at the bottom right
Sync your iPhone to iTunes on our computer
Sync it to iTunes.
Plug in your iPhone. Connect to iTunes. Click Sync.
After you buy the music in the itunes store you have to sync it.
Your iPhones contacts can be synched with your computers contacts though iTunes. You can set this up by plugging in your iPhone, Opening iTunes, clicking on Contacts, and then checking the box next to sync.
activate the phone first and then sync it with your itunes on your computer
I had this problem too. I had iTunes installed already, but when I tried to sync my iPhone, nothing came up on my iPhone screen. I quit iTunes, and unplugged my iPhone, then plugged it back in and opened iTunes again.
You have to Sync it with iTunes.
sync you Iphone with your Itunes library.
Via iTunes, add the .ipa files to iTunes Library and sync with the iphone