If you don't have iCloud set up, you can sync your contact information using iTunes.
Contacts, Calendars, Bookmarks, and Notes
You can sync contacts, calendars, bookmarks, and notes with other applications on your computer. This allows you keep all your information in sync across multiple computers and iOS devices. The settings for these items are all in the Info tab for your iOS device in iTunes. With your iOS device connected to the computer, select your iOS device. Then click the Info tab.
For details on syncing content on your iOS device with your computer, click the sections below.
To sync contacts with your computer, choose "Sync Address Book Contacts" on your Mac.
You can sync your contacts with:
- Address Book (Mac OS X)
- When syncing contacts, you can choose to sync all of your contacts or only selected groups. The option to sync selected items may not show up until after the first sync.
- You can select a group of contacts to which all new contacts created on your iOS device will be added.
Hope this information helps ...