Is there anyway to turn off 3G under IOS 5.02? My battery cannot last for 6or 7 hrs, so I disabled 3G. I turned on the 3G only if I need to. It works fine until I "UPGRADE" to the latest IOS 5.02. The option to turn off 3G is gone.. and the battery can only last for about 4 or 5 hrs.... is there any way I can turn off 3G?????? Need help!!