I did the update thru itunes after backing up. Everything worked fine in the update. Now, for the bad part-I want my old ios back. My phone sucks now. Slow responses to opening anything, apps that don't work, internet slow and phone service is terrible. What happened???? I am very disappointed in this update. After researching, I felt maybe it was going to be a great thing, but it really didn't help my iphone 4 in anyway but to make it slower. My wife's iphone 4s so far has been great. If you haven't done an update, I would recommend waiting until the bugs are all out. Tried to call verizon, but they are way too busy, wonder why....bad ios update. would like to find out what is being done about all this.