Mine disappeared yesterday and I spent a good portion (over a few hours) going through every setting/tweak, re-springing, and rebooting completely. It was gone completely from my phone. Spotlight couldn't find it and I could not find the files in ifun-box either. I got frustrated and decided to restore and of course that solved the problem. However, later last night I saw on youtube that others were having the same problem and they deleted iconoslam and everything showed up again.Has anyone else had this problem? The app store icon is no longer on my iphone 4s. I can't even find it when I do a search.