I want to clean my treo 650 so i canstart anew. I have put so many things on there that I dont need or want but I dint know what to do to clean it so that it is like factory new. I have an sd card and want to keep my calender, pictures, and contacts but the rest can go..what do I need to do? Actually, there are also some contacts that I want to go to because they wont delete from the phone, how do I accomplish this