Connect the iPad to your computer using the supplied USB cable.
Follow the on-screen prompts to set up your iPad.
This process includes the registration and syncing of your iPad.
During syncing, you are prompted to sync your music, video, and other content (e.g., calendars, bookmarks, etc.).
Activate your 3G cellular service:
Allow several minutes for the activation to complete.
From a Home screen, navigate to: Settings > General.