I updated to the iOS7 on my iPhone 4S without backing up my iPhone. However, I have my iPhone set to use iCloud whenever the phone is plugged in and connected to WiFi, which it always is when charging. Therefore, is the phone automatically backed up, everytime it's on iCloud? Is it necessary to back up to iTunes if it is in the Cloud?
Note that I have not backed up to iTunes but once since changing over from a 4 to a 4S in June this year. Do I need to?
Thanks for your help.