I am using the new apple iPhone4 from last five months, on last days i was installing "Canon Cadets" on to my iPhone. but during the installation that application is suddenly got crashed and my iPhone4 is restarted. After rebooting the iPhone all my previously installed application were deleted, fortunately all my default applications are safe. Then i again rebooted my it then also they did not appeared. I don't know what to do now, is there is any way to retrieve all those applications. If any one having suggestion then please tell me. Thanks in advance.