On Windows 11, if the driver fails to install, you may need to temporarily disable "Driver Signature Enforcement" in the Advanced Startup menu to allow older legacy drivers. Official Manuals:

For basic connectivity, the is the most reliable choice. While originally intended for Android devices, this universal package includes the necessary components for most Samsung mobile hardware, including feature phones like the E1205T. Version: v1.9.0.0 (Latest) Release Date: April 10, 2025 Compatibility: Windows 7, 8, 10, and 11 (32/64-bit) Source: Samsung Developer Portal 2. Manual Installation Steps

Discontinued Legacy Device. As of 2021, Samsung has officially discontinued support pages for the Samsung E1205T (Rex 60/Guru) on their global website. The standard "Kies" software used for smartphones does not support this device.

Execute the .exe file as an Administrator.

You can download the verified driver from the official Samsung website or through the Samsung Kies software.