Abstract:This paper explains how to read data from OneNand Flash bypass the file system in Windows Mobile 5.0 smartphone. Firstly, the characteristics of OneNand Flash and Windows Mobile 5.0 operation system are briefly introduced. Then, the paper elaborates the method of reading data from OneNand Flash with blocks and transmiting the data to PC. At last, with the instance of developing a GHOST sorftwore on Windows Mobile system, this paper explains the method in detail and shows part of the key source code.