An Apple ID gives you access to several functions on your mobile phone such as iCloud, App Store and iTunes. Before you can activate an Apple ID on your mobile phone you need to set up your mobile phone for internet.
Tap iTunes & App Stores.
If you don't have an Apple ID, tap Create New Apple ID and follow the instructions on the screen to create an Apple ID.
Tap Sign In.
Tap Apple ID and key in the username for your Apple ID.
Tap Password and key in the password for your Apple ID.