[LG Optimus 4X HD] muellersmattes:
As I saw Index threads on many other forums, I just thougt i'd make one myself. If you want something added, write it down. I'll update it in more or less regular intervals. I'm no good at formatting, so that'll be done later.

General​

Different phone modes

Google Service Codes

Access hidden Menu: dial 3845#*880#

Stock Firmware list on external site

Flashing tools - attached!

LG PC Suite Version Hacker - Install your KDZ files with LG PC Suite

FAQ for Optimus 4X

Guides/HowTo​

General Guides/HowTos

Update firmware through flashing the kdz files (With Picture) Step by Step

Change your Baseband

Disable hardware buttons and enable software buttons

JB Root/Unlock

Root method for v20a (and probably later) firmware

Official bootloader unlock procedure from LG AND the one that works for everyone

Unlock relock bootloader tool

How to use Fastboot on the 4X

[Toolkit V1.3]Root , Unlock Bootloaders , Flash Recoveries & Kernels...

Root on ICS

How to Root your LG Optimus 4X HD (O4X P880) - method for 4.0.3 versions (v10)

Root MANY ANDROID! - works for most devices (e.g. P880G)

Obtain Root on newer Canadian/Brazilian firmwares

Rollback from v20a to v10

Recovery​

CWM for unlocked bootloader

TWRP for unlocked bootloader

GBootMenu

[Bootstrap] CWM Touch recovery v6.0.1.1

[Bootstrap] TWRP for Optimus 4X HD

Custom ROMs​

Use the google doc from this thread now. The list below won't be updated by me.

AOSP/CM ROMs

JB 4.3 ROMs

[ROM][Official]CyanogenMod Nightlies for the Optimus 4X HD (p880)

[ROM] [4.3] [Paranoid Android 3.99][Unofficial]

[ROM] [4.3] [UNOFFICIAL] AOKP for the Optimus 4x HD]

[ROM] [JB 4.3][AOSPA 3.97][AOKP-MR1][CM 10.2] PAC-man AIO

[ROM] [4.3][OFFICIAL] Vanir | Faster than the average ROM

EternityProject's CyanogenMod for LG Optimus 4X HD

[ROM][4.2.2/4.3][AOSP] » CarbonRom [UNOFFICIAL]

[ROM][4.3] SlimBean - P880 - Optimus X4 HD[UNOFFICIAL]

[ROM][4.3][CM10.2][OFFICIAL][HALO][MULTI]Mokee OS

[ROM][JB] [4.3] Avatar ROM for LG Optimus 4x HD (p880)

[Rom][4.3][Unofficial] ProBam

[ROM][JellyBean][4.3]BeanStalk Build

JB 4.2.2 ROMs

[ROM] WerewolfJB CM10.1 v006

[ROM][4.2.2][AOSP] » LiquidSmooth[OFFICIAL]

[ROM][4.2.2] SlimBean - P880 - Optimus X4 HD [Build.8-Final][UNOFFICIAL]

[ROM][4.2.2][GCC 4.7] JellyBeer - v4.33 [Hybrid]

[ROM][JB 4.2.2][AOKP/CM10.1/PA] ReVolt JB [Linaro 4.8.1][Unofficial]

[ROM][4.1.2]CustoNexus PORT [All-in-one:CM- PA-AOKP]

LG UI ROMs

[ROM] [JB][V20A]LG 4X HD deodexed and zipaligned

[ROM][JB 4.1.2] Zaiben

[ROM][JB][4.1.2][V20C][MAGIC ROM HD v2][Enjoy With New Experience]

Other ROMs

[ROM][MIUI V5][4.1.2] MIUIAndroid

[ROM][SENSE]UnoX SENSE4 for Optimus 4X HD - FIRST CUSTOM ROM!

Kernels​

EternityProject Kernel

Werewolf Kernel

iodak Kernel

Optimus Prime

Optimus Play

MODs​

MultiROM

[Deodex, zipaligned] app / framework / Remove LG Stock App for V10C , V10E , V10F

Screen Off CRT for V10C,V10F

(Fully working) V5 (20120918) Camera Mod - for better pictures and low light videos

Shutter/Auto focus Sound Off For LG 4X HD

UMS mode for external SD

Special Apps​

Modified LED Touch notifications for O4x

LG GearBox for Optimus 4X HD [with Power saver]

Themes​

How to create Themes for LG Home

Black Droid Theme V3.0.1 (SOON NEW)

[10B/10F] Statusbar NoClock / Battery 100 Percent / Black Flat

Xperia T Theme

Misc​

Boot to recovery (Bootstrap)

LG Service files

LG P880 Disassembly and assembly

Extract .kdz to .dz