I have a question on this topic. I was having crappy battery life on my iPhone 5. So, this morning I set the slider on icloud to on for contacts, enabled icloud, then did a backup which I assume put my contacts on the cloud and nothing else? I had like a 5.6 MB backup. Next I restored as new. It didn't seem to bring over anything, settings, photo, etc. I then turned on icloud and contacts and it downloaded to my phone.
Did I do all of this right as far as not bringing in junk from before and just getting my contacts back? I want to make sure 100% that I don't have settings and junk left over so I can be assured of a new iphone and optimal battery life. I appreciate any input.