I have had a horrible experience with the battery life on my iPhone since upgrading to IOS 5. I have seen that a lot of others have had issues as well. I have an N network. I also still have my G network up and running. If I stay on the G network all is fine with my battery. If I am on the N network forget it. It will be drained by morning. I tried a bunch of the suggestions turned off location services etc and nothing worked until I removed the N network and put back the G. After returning to the G network for a few days I went back to the N to see if I was crazy and sure enough the fast battery drain was back. Is anyone else seeing this with an N network?