I've read tons of reviews, but I haven't seen any talking about the battery with the 4G off and 3G in its stead. This seems like a no-brainer to me considering 3G is plenty fast. This made me wonder: does the Droid Razr even give you the option to disable 4G, or is the battery terrible just because it has 4G tech? If the battery is improved with 3G, does anybody have the hours? The battery-life is really the deciding factor for me between the Droid Razr or the iPhone 4S.