device not mine in diagnostics data

Hi in my web data my iphone 4 is showing different information sent to apple and its showing a device used apple iphone 3.1 which is not a device that is mine or my family - i am wondering if this is possible to locate or find out what information is being accessed and why this has happened and its also showing that my websites i have visited have also been listed and my iphone app for anz go money is also paired with this device - please help