Not sure how this is done without jailbreaking but if so I Amy have to return my 4s and wait for the 5. Granted the 4s is quick and the camera is stellar, would the fact that you can have Siri on your 4 make you go back?
http://cydiahelp.com/siri-on-all-io...red-connected-successfully-to-apples-servers/
http://cydiahelp.com/siri-on-all-io...red-connected-successfully-to-apples-servers/