Love my new Incredible. (I hope to make all of my ATT/iPhone friends jealous with a comparable phone (maybe even better) with definitely better service --- I can hear my calls!) I upgraded from an LG Dare, so one thing I'm trying to figure out is the difference btwn using WiFi vs 3G access. Am I correct that you always use 3G for making calls, but can use either WiFi or 3G for apps and surfing. I'm assuming leaving WiFi on uses battery, but when I have WiFi access does it drain the battery less than 3G. Also, does the phone decide when to use one vs the other or do I decide if WiFi is available to me???