You need to use XDM download manager to download kdz firmware from LG server.
The VS87611a is no longer available for download from LG Server.
A new software update build VS87611B for Verizon LG Lucid 3 (Model:VS876) is available now! This Update will upgrade your lucid 3’s software to version VS87611B
Verzion LG Lucid 3 owners should receive the update via OTA starting from August 5. The Update will also be available via Verizon Upgrade Assistant Tool Starting from August 8.
If you are unable to update your software over the air you may use the Verizon Wireless Software Upgrade Assistant.
With your phone powered on, connect to your PC via the microUSB cable.
On your computer you will be notified that your phone has been connected and a AutoPlay screen should display. Select VZW_Software_upgrade_assistant.exe to install the Verizon Wireless Software Upgrade Assistant.
VS87611B Software Update change Log:
Improve faulty touch and sensitivity
Google Security Patch
Changed the email provider list from Windows Live Hotmail to Outlook.com
Increase the size of the battery icon in the status bar
Visual Voicemail improvements
Power cycled device and it took over two minutes to start up -FIXED
Display a blank screen when closing applications – FIXED
Source: Verzion Wireless.