Many SIS files use specific Symbian OS native APIs that simply do not exist in the J2ME (Java 2 Micro Edition) environment.
Success is limited to SIS files that contain Java MIDlet components. Most native Symbian applications cannot be meaningfully converted to JAR format. sis 2 jar converter
UnSIS is a dedicated extraction utility that can unpack the contents of a SIS file, revealing all embedded resources: Many SIS files use specific Symbian OS native