Turn on your device. You should see a Hello screen. If you’ve already set up your device, you will need to erase all of its content before following these steps to restore from your backup.
Follow the onscreen setup steps until you reach the Apps & Data screen, then tap Restore from iCloud Backup.
Sign in to iCloud with your Apple ID.
Choose a backup. Look at the date and size of each backup and pick the most relevant one. After you've chosen a backup, the transfer will start. If a message states that a newer version of software is required, follow the onscreen steps to update. If you can't see the onscreen steps to help you update, find out what to do.
When asked, sign in with your Apple ID to restore your apps and purchases. If you’ve purchased iTunes or App Store content using multiple Apple IDs, you’ll be asked to sign in to each one. If you can’t remember your password, you can tap Skip this Step and sign in later. But you won’t be able to use the apps until you’ve signed in with your Apple ID.
Stay connected and wait for a progress bar to appear and for it to be completed. Depending on the size of the backup and the network speed, it may take anything from a few minutes to an hour for the progress bar to be completed. If you disconnect from Wi-Fi too soon, the progress will be paused until you reconnect.
Now you can finish the setup process and enjoy using your device. Content such as your apps, photos, music and other information will continue to be restored in the background for the next few hours or days, depending on the amount of information there is. Try to connect regularly to Wi-Fi and power to enable the process to finish.