Changing your call plan now could mean you lose some of the call extras you added earlier, as some of our call plans include them as standard. It's worth double checking to make sure you get what you want.
Turn on your new iPhone and complete the setup by selecting your language and country, and choose whether to enable Location Services.
When asked, choose your Wi-Fi network. If you don't have a Wi-Fi connection, you can tap Connect to iTunes.
When prompted to set up your device, select Restore from iTunes Backup.
Connect your new iPhone to iTunes (on the same computer you used to back up your old device). iTunes will ask you to restore from backup or set up as new. Select the backup of your old device and choose Continue.