| Symbian OS Program Installation Executable Format | |
| Symbian | |
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SISX is an extension specific to files that contain installation packages for the operating system of mobile devices called Symbian. This software was found in phones from companies such as Nokia, Motorola, Siemens and Sony. SISX packages replaced the older format that used the SIS extension.
Currently, SISX files are rare and considered obsolete. The Nokia 808 PureView was the last phone model to have the Symbian operating system installed.
Windows
Updated 03/15/2022
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