use the backup assistant before you activate your iphone. It will back up all your contacts or easy way to threw gmail sync. Mine syncd right up threw the google
To transfer contacts from BlackBerry to iPhone 5/6:
- Connect your old Phone to iTunes on your PC/Mac and sync - In the Info menu, ensure your contacts are set to sync
- Connect your new iPhone to iTunes (on the same computer you used to back up your current iPhone)
- iTunes will ask you if you want to 'Restore from a backup' or set up your new iPhone as a new phone.
- Select 'Restore from a backup' - Choose the most recent backup of your current iPhone (if prompted)
- Sync your new iPhone to receive the backup information and your contacts.