Thank you for your response, Norm. I've checked settings and as of now the usage shows under 4 hours and standby 15, but I'll keep an eye on that setting to see it I can locate the problem there. It appears to update each time the phone is charged. Unfortunately, the problem it is inconsistent so it's hard to see where it is. I am also trying an app called Dataman Pro which tracks data usage of different apps. I read an article on Tidbits by Adam C. Engst which has some good ideas to try - it seems that this may be a problem with ios6 so I'm hoping that ios7 may solve it when it comes out, but meanwhile I can't depend on my battery getting me through the day. I am fortunate to have grandfathered unlimited data, but after I use 5 gb - yes that is gb - I never went over 2 until this started happening - it slows down. I think I lose the 4g LTE. So the data isn't as much as an issue as the battery.