LS970ZVB is not available for download.
The new software version is officially available as of Today for the Sprint LG Optimus G (LG LS970) updating the device to software version “LS970ZVB”.
You can check for the update through the Software Update section in the Settings menu, or just wait for the phone to prompt you about the update in the Notification Panel. Also, you will be able to plug your device into a PC and run the LG Mobile Support tools Software and update the phone via USB.
To download the Stock LG LS970 “LS970ZVB”Firmware
Here you are the USB drivers and LG mobile support tool software you will need to perform a software update via USB
>Download Sprint LG LS970 USB Drivers
Download LG Mobile Support tools Software</blockquote>
if you experience any issues with this LS970ZVB firmware update with your Sprint LG LS970 cell phone, please share with us.