Keep contact information up to date across all of your devices to ensure you have access to phone numbers, emails and addresses whenever you need them. You can transfer contacts from your computer to your iPhone using either iTunes or iCloud.
Transfer Using iTunes
Connect your iPhone to your computer and launch iTunes on the computer, if it does not launch automatically. If you don't have iTunes on your computer already, you can download it from Apple's website at no charge.
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You must use the iPhone's USB cable the first time you connect the phone to your computer. If you'd prefer to connect wirelessly moving forward, enable Wi-Fi synchronization in iTunes. Select your iPhone on the list of connected devices in iTunes, click the Summary tab and then place a check mark in the Sync With This iPhone Over Wi-Fi check box. When this feature is activated, your iPhone and iTunes connect automatically whenever they are on the same Wi-Fi network.
Select your iPhone on the list of devices displayed near the top of iTunes.
Click the Info tab on the menu along the left of the program.
Place a check mark in the Sync Contacts With check box, select the program on your computer from which you want to transfer contacts and then click the All Contacts radio button.
If you only want to transfer some of your contacts instead of them all, click the Selected Groups radio button instead and then choose the contacts you want to transfer.
Click the Apply button to save your settings and transfer the selected contacts onto your iPhone.
Transfer Using iCloud
You can also sync contacts wirelessly with your iPhone using iCloud, which is convenient if you use Outlook to manage contacts on your computer. The primary benefit to using iCloud over iTunes is that contacts are automatically updated on your iPhone whenever you make changes on your computer.
Download and install the free iCloud for Windows program on your computer.
Open iCloud for Windows and sign in using the same iCloud account you use on your iPhone.
Check the box located next to Mail, Contacts, Calendars, and Tasks and then click the Apply button.
Open the Settings app on your iPhone and tap iCloud on the main menu.
Toggle the Contacts switch to the On position to enable automatic synchronization between your computer and your iPhone.