You need to activate your tablet before using it for the first time and also when you've restored the factory default settings. It's easy, but remember you need to insert your SIM before you can use this function.
Drag the arrow right.
Key in your PIN and tap OK.
To change language: Tap the required language.
Tap arrow right.
To change country or area: Tap Show More....
Tap the required country or area.
To activate your tablet using Wi-Fi: Tap the required Wi-Fi network or Other....
Follow the instructions on the display to connect to the required Wi-Fi network. Tap Next.
To activate your tablet using the mobile network: Tap Use Mobile Connection.
Tap Enable Location Services or Disable Location Services.
If you select Disable Location Services:
If this is the first time you use an iPad: Tap Set Up as New iPad and go to step 5a.
If you've used an iPad before and want to restore previous content from an iCloud backup: Tap Restore from iCloud Backup and go to step 5b.
If you've used an iPad before and want to restore previous content from an iTunes backup: Tap Restore from iTunes Backup and go to step 5c.
To activate your tablet using an existing Apple ID: Tap Sign In with an Apple ID.
To activate your tablet using a new Apple ID: Tap Create a Free Apple ID.
To activate your tablet without an Apple ID: Tap Skip This Step.
Tap Skip. Follow the instructions on the display to activate your tablet.
Tap Next. Key in the username for your Apple ID.
Tap Password and key in the password for your Apple ID.
Tap Agree to confirm.
Tap the required backup.
Tap Restore. Your tablet restores the contents of the selected backup. Follow the instructions on the display to activate your tablet.
Tap Next. Go to www.itunes.com on your computer. Find the download section on the website to download iTunes. Download and install iTunes on your computer.
Start the program iTunes on your computer.
Connect the data cable to the phone tablet socket and to your computer's USB port.
Click Restore from this backup.
Click the drop down list next to "Restore from this backup".
Click the required backup.
Click Continue. Your tablet restores the contents of the selected backup.