I took a picture today that seems to have completely messed up both my camera roll and photo stream on the iPhone. It "ate up" like ten pictures taken before this picture, and none of the pictures that I've taken afterwards show. These pictures doesn't show up in the photo stream either, despite those taken before that were eaten up showed... They show in the photo stream on my mac and the iPad. But, since there seems to be a problem on the iPhone I'd like to restore it. But I can't seem to find a way to do it without connecting it to a computer and restoring it via iTunes. I thought iOS 5 would make the iDevices "PC free". Apparently not. Or am I missing something? tl;dr: how do you restore an iPhone via iCloud without using a computer?