How to open .SIS file extension?

If you cannot open a new file that has been saved in the .SIS format you need to download the appropriate software. The manufacturer of .SIS files is Symbian; .SIS files belong to the Misc Files category. After downloading the application from the list available on our website just run an unknown file, and as the default set the newly installed application supporting the .SIS files. Activities performed in the order described should solve the problems with all the files in the .SIS format.