Hi there. I seem to have a problem with my iphone 4. I have wi-fi off, location services on, screen brightness at 50%, mobileme push on, notifications off, fetch two email accounts every half hour Stand by time seems to be greater than my 3g (which would last about 6 hours after two years) but if I use it, I'm losing 1% battery every two minutes if I'm reading a text but if I'm playing a game or using GPS it drops about 1% per minute. I've seen people say they use their iphone 4 all day just causally and its still in the 80% range. My phone seems to not last a day of casual use. Do you think there might be a problem with the batter? Is there any way to check? Thanks guys.