Check below post on LGVIET. A custom rom for E980 specially.. Enjoy..
All links removed as per request by Hoangnova. . Please wait for further instructions...
1.Flash the stock 4.4.2 for on E980 (V20g)
(its a must or u may end up having low storage or brick the phone)
4.Goto recovery and wipe data/Cache/Dalvik Cache
5.Flash ROM and perform wipes again..
6.Reboot and enjoy
First boot will take time.. so be patient..
Screenshot below :