Just picked up a 2nd-hand Droid off ebay, I'm really excited, never had a smartphone before. I have a friend who has been filling me in on details, but there are a few questions he can't answer. The main one: I am on a family plan w/o data, there is no chance of me getting data, and I'd rather not have another bill (poor college student), I bought the phone mainly as a toy, for the camera / audio / video / gps / apps / wifi web browsing. My old phone is a Rumor 2 (sprint), and from what I've read, the Droid is hardware compatible with Sprint's network, but it's required that you have a dataplan to connect a smartphone to it. Is there any way for me to just replace my old phone entirely, and connect my Droid to the sprint network, without a dataplan? If not, does the cellphone antenna turn itself off (save battery) by itself, or do I have to do this manually? I've also read a bit about undervolting the processor, to increase battery life, do you think it's worthwhile to try? I'm not going to be playing many (any?) games, so if I can downclock the gpu maybe, that would be good too. He gave me a list of basic apps as well, but I'm happy to take suggestions. Is the stock media player good for mp3s, or does anyone have a 3rd-party preference? What's a good weather app that does not run in the background? Etc. Thanks!