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Apache configuration for mobile application download
The following needs in the Apache server for the phone/device to understand the MIME type from the webserver.
Create a .conf file with the following contents:
AddType application/octet-stream sisx
AddType application/vnd.symbian.install sis
AddType application/java-archive jar
AddType application/x-java-archive jar
AddType text/vnd.sun.j2me.app-descriptor jad
The above will let j2me and sis/sisx files to be recognized by the device. Add this file to /etc/httpd/conf.d/ directory and reload apache server
For sisx filetype, please consider using x-epoc/x-sisx-appas described in  (archived) [phoneynk]