I am seriously considering the iphone 5 and will likely pick one up over the weekend. A few elementary questions: 1. will the service on my old phone stop immediately once I set up a contract for the iphone 5? Or, do I have to set up the iphone 5 first before the old phone stops working? 2. I am likely buying an otterbox defender case. Is there any other case with similar protection with a bit less bulk, by chance? 3. Are there any 'essential' accessories I should get, aside from a case? 4. The local apple stores are all booked up for intro workshops on the iphone. Is there a book or website that you recommend for the basics as a substitute? Thanks, sorry for all the questions.