All Credits to LGVIET:
Thread link - lgviet.com/forum/threads/root-recovery-stock-4-4-2-kitkat-g-pro-f240l-s-k.15539/
the thread is in Vietnamese so here is the google translated link
and below is the link for sphinx GPro V1.5 ROM, This is based on a stock ROM (F240K KitKat 4.4.2 V20E ROM) therefor all the cool stock features are still intact. Follow the guide exactly as it is to avoid soft bricks.
01) you need to be on the background of F240L V20D, and V20E of F240K F240S
(LG Software Version) ( Settings->general->about phone->software information->Software version)
02) DO NOT do a factory reset , nor in CWM recovery (no need to wipe anything).
03) Flash the Sphinx G Pro ROM then Flash the Patch IMMEDIATELY WITHOUT REBOOTING.
04) Wipe data/factory reset ->wipe cache partition ->wipe dalvik cache.
05) reboot system.
All Credits to LGVIET & Sphinx LG team:
google translated link
Screenshots after installing Sphinx G Pro and customizing
For themes I created for LG G Pro Go Here...