To restore your iPhone from an iCloud backup, first update your device to the latest version of the iOS operating system. Ensure you have a backup in your iCloud. If you have a backup, reset your device, and restore the device from the iCloud backup.
- Update your phone's operating system
Tap on the Settings app on your iPhone. Select General and then Software Update. If you require a software update, download and install the latest version of iOS. You must have the latest version to restore your device from an iCloud backup.
- Ensure you have an iCloud backup
Tap the Menu button to return to your Home screen. Tap Settings, then iCloud, then Storage, then Backup. The most recent backup, which has a time and date associated with it, appears at the bottom of the screen.
- Reset the iPhone
From the Home screen, tap on the Settings menu again. Select General and then Reset. Choose Erase All Content and settings.
- Restore the iPhone using an iCloud backup
Tap Set Up Your Device, and choose Restore from a Backup. Sign into your iCloud account when prompted. Select Choose Backup. A list of backups appear. Choose the most recent backup from the list. The iPhone is restored using that backup.