To trace and verify an illegal usage of IT technology, digital forensics are known as an usefull approach. The digital forensics is a procedure of criminal investigation for assure of legal ability by scientific analysis in electronic equipment. smart phone is the one of the best mobile IT devices. Evidence in digital form is the way of doing to create, reproduce, modify, remove, transport Thus, specific procedures and methods are required to achieve legal evidences. A hardware device has special processor and interface modules for it's own function under designers characteristics. An application program has it's own useful program utility and file structures. On forensics, it should be evaluated on the hardware and source code. This paper shows how to make forensics evidence on the hardware devices as it comes illegal property in ownership.