You may not have to factory reset. I do it because I use System Cleaner ROOT to move all updates to system apps to system partition to save space on user storage partition. That is what it doesn't like after ROM update. I get errors all over the place from those apps. If you don't do that with your system apps, then you may not have to factory reset.
Sent from my LG-D801 using XDA Free mobile app
The latest update on the LG servers! Not an OTA. D80120G, Kit Kat 4.4.2. Here's a link to the kdz file on their server. You can use the LG Mobile Support Tool to upgrade. After putting your phone into download mode (holding volume up while plugging in usb), go into the options menu and selected Upgrade Recovery. You will need to have the latest LG USB drivers installed. Unfortunately, the Mac drivers do not support software upgrades. Towelroot does not support D80120G yet.
D80120G KDZ File
For D80120E: I lost root and recovery when I updated, but was able to re-root with towelroot. Here's a link to their website. Then I installed and ran AutoRec to install TWRP, then flashed Cloudyfa's kernel v1.3 to enable Knock Code.
D80120E KDZ File
http://oceanhost.eu/g92b383v7jqe/D80120E_00.kdz.htm mirror - thanks hyelton!
D80120A KDZ File
http://storagecow.eu/index.php?dir=X...T-Mobile+G2%2F mirror - thanks hyelton!
LG Mobile Support Tool...Thanks CollinFX45 for the link!
Latest drivers from LG (as of 7/2/14)
You can also download 4.4.2 through the PC Suite. Thanks elzero26 for pointing this out!
If you are having issues with updating your phone with the Support Tool or the PC Suite, you may have to update it following the directions from the link below.
Alternate method for updating software
As always, flash at your own risk.
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