Can you change the time when iCloud Backup takes place? I have free data from midnight until 6AM and want backups to be done during this time to iCloud.
You can't change the time, but leaving an iPhone plugged in overnight will cause the iCloud Backup to start between 2:00 am and 4:00 am. iCloud Backup does not happen overnight if not connected to a Wi-Fi network, so free cellular data is a moot point.