You can download the latest fitmware (KDZ file) and use LG Flash Tool to push it to your device.
Make sure you have the latest LG drivers installed on your PC
LG Flash Tool Download
Latest Stock Rom Download
1) Extract LG Flash Tool to your desktop.
2) Power off device.
3) Plug device into PC via usb cable.
4) If the drivers start to update, let them finish.
5) Hold Vol Up to boot into download mode.
6) Open up the flash tool and set "select type" to CDMA.
7) Set PhoneMode to "DIAG"
8) Pick the KDZ file you downloaded moments ago. (Stock Rom)
9) Click CSE FLASH and then START.
Make sure you have the latest LG drivers installed on your PC
LG Flash Tool Download
Latest Stock Rom Download
1) Extract LG Flash Tool to your desktop.
2) Power off device.
3) Plug device into PC via usb cable.
4) If the drivers start to update, let them finish.
5) Hold Vol Up to boot into download mode.
6) Open up the flash tool and set "select type" to CDMA.
7) Set PhoneMode to "DIAG"
8) Pick the KDZ file you downloaded moments ago. (Stock Rom)
9) Click CSE FLASH and then START.
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