With LG's official Update Center shutting down soon, keeping older 3G and 4G devices running is getting harder.
The new release is hosted on (login required) and XDA Developers Forums (trusted mirrors). Do not download from random file-sharing sites. -New release- Lg 3g Mobile Download Program
: Scans for the latest available official firmware and automates the installation process via a USB connection. With LG's official Update Center shutting down soon,
Communicates with LG phones via USB to install firmware files that control phone functions. Device Support: Designed for older LG 3G models including the KU990 (Viewty) Capabilities: -New release- Lg 3g Mobile Download Program
: Navigate to Settings > System > System Updates and tap Check now for update . Ensure you have at least 80% battery before starting.
by z3x-team are still used by technicians for firmware management and recovery.