1. Connect your device to a Wi-Fi network.
  2. Go to Settings > [your name], and tap iCloud.
    tap iCloud
  3. Tap iCloud Backup.
    tap iCloud back up
  4. Tap Back Up Now. Stay connected to your Wi-Fi network until the process completes.

You can check the progress and confirm the backup completed. Go to Settings > [your name] > iCloud > iCloud Backup. Under Back Up Now, you'll see the date and time of your last backup.