For most users, there is no manual "Download" button on the official website for this specific model. Instead, use the following methods to ensure you are running the latest version. 1. The Automatic Update (Standard)

Perform a hard factory reset. Hold the pinhole reset button for 15 seconds while powered on. Computer is assigning an incorrect IP address.

Since the Sagemcom F-ST 5366 is rarely sold retail, firmware is distributed by the ISP: