Launch Apple iTunes. Plug the Universal Serial Bus connector cable that came with your iPhone into the device and the computer.
Adding the contacts from your computer's Windows Contacts database to your Apple iPhone can save you time, because you won't need to create new entries for each contact on your iPhone. To upload contacts from Windows to the iPhone, you'll first need to modify the synchronization settings on the Apple iTunes software running on your computer. Once you've uploaded contacts by synchronizing the iPhone with your computer, you'll be able to access the details for all your Windows Contacts from the iPhone.
Click and highlight your iPhone in the "Devices" section on the left side of the iTunes program window.
Click the "Info" button in the main iTunes navigation menu.
Click the check box beside "Sync Contacts With" at the top of the Info page to select and tick this option. Select "Windows Contacts" from the pull-down menu beside the check box.
Scroll to the "Advanced" section at the bottom of the page. If you want the uploaded Windows Contacts records to replace the contacts on your iPhone, click the check box beside "Contacts" to select and enable this option. If you don't select this option, the synchronization will also add the iPhone's contacts database to Windows Contacts on your computer.
Click the "Apply" button at the bottom of the page to saves your changes and start the synchronization procedure that uploads Windows Contacts to your iPhone.
Wait for the "OK to Disconnect" message to display in a new window in iTunes. Unplug the connector cable from the computer and the iPhone.
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