Upgrade guide Title Firmware for 3D PDPVersion: 1001.0Applicable Model PDP: C490, C675, C680Carrier or Corporate Customer All CustomersDescription This firmware prevents below problem - Volume going up and down intermittently

Step1. How to prepare the USB Memory Drive
2. Connect the USB Memory Drive
to the USB port of your PC.
Copy the file onto the USB Memory Drive.
3. Go to the USB Memory Drive and then double click the file.
1. Save the firmware file onto your computer.
File Name : T-SAT4AUSHC.exe
4. Click on the “Unzip” button. 5. Unzipping is in progress.
6. After completing, click on the
“OK” and “Close” buttons.
7. A folder containing the firmware files
has been added to the USB memory drive.
Folder name : T-SAT4AUSHC
8. Safely disconnect the USB memory drive
by right clicking the green check mark
on the taskbar and then left click
“Safely Remove”.
OK