I received my update a couple hours ago.. and I too like some other posters did NOT know what the new ICS update was. I received the same attached notification on my Epic 4g as the poster did which said your phone needs to update to improve enhancements, etc so I did. Now some changes I have noticed, keyboard is different, the Contacts icons are larger. my battery is not quite dying faster, so not sure yet if that has been affected since I am currently charging it. Notification icons are bigger are different on top.. and some other apps have some different functions, but I thankfully haven't experienced an issue YET... definitely feels like a different phone as I am re-learning some things. I only found out about this update today when I noticed after the update how many things were different so I googled the version 4.0.4 and found you wonderful folks lol. So I hope it doesn't cause me issues, as I just got this phone from Sprint a month ago and TOTALLY love it.