I have an Iphone 3G and after my first full day with it it seems like my battery life is pretty bad,my Iphone is running the 3.0 version os software. I did some digging and turned off my wifi,push email and lowered my brightness to the 50% mark,do you think this will help my battery life? Is 3.1.2 better on battery life? What are the pros/cons of keeping the 3.0 vs. going 3.1.2 in regards to battery life? thanks.