An Apple ID gives you access to a number of services on your phone such as iCloud, App Store and iTunes. Before you can activate an Apple ID on your phone you need to set up your phone for internet.
Press Sign in to your iPhone.
If you don t have an Apple ID, press Don't have an Apple ID or forgot it? and follow the instructions on the screen to create an Apple ID.
Press the field next to "Apple ID" and key in the username for your Apple ID.
Press the field next to "Password" and key in the password for your Apple ID.
Slide your finger upwards starting from the bottom of the screen to return to the home screen.