Samsung is one of the world's leading mobile manufacturers. The U600 is one such phone which offers great multimedia features to its users. When installing applications on the U600 one must be aware that both JAR and JAD files are required. In case the downloaded application does not have a JAD file then the user can easily retrieve it into the required format by using the JAD maker software. After the conversion, the user needs to transfer the JAD and JAR files to the mobile and activate it using the File Manager option available from the main menu of the phone.