Rom 4.0.4 - v30А - available for download!!

Official Rom from LG - v30a!!!!
This release is the same that is from 7.12.12!!!!!

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links for download:
official link from lg (kdz version)
http://csmg.lgmobile.com/swdata/WEBSW/LGP990/ANEUDW/V30a_00/V30A_00.kdz

Smartflash version of the Rom
http://file.qip.ru/get/EpX_YlZ5/BIN_LGP990AT-00-V30a-EUR-XXX-N.html
mirrors:
http://www.multiupload.nl/Z4413CU6XN (thanks to sander-m)
http://www.putlocker.com/file/28C0DF5FDD929E34 (thanks to tiagorl)
Ril http://www.multiupload.nl/2764GZ1F8Q
BB http://www.multiupload.nl/0C893V659X (thanks to cojo11)

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You are going to download zipped file. This The download contains the following files: (thanks to petr.klos)
LGP990AT-00-V30a-EUR-XXX-NOV-30-2012+0_AP.bin
LGP990AT-00-V30a-EUR-XXX-NOV-30-2012+0_CP.fls

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For flash use Smartflash

Smartflash tutorial by PAUL (thanks to petr.klos)
I would just add, that this thread is focused on flashing sole baseband. To flash firmware (ROM) you have to add one single step.
Where is
"--Click the browse button next to 'CP Bin:' and select the baseband (FLS) file--"
you add
"--Click the browse button next to 'AP Bin:' and select the firmware (BIN) file--"

For those who get errors while flashing, this is what always fixes issues for me: (thanks to Custom40)
1) Reboot PC and just start over.
Or:
2) If you face an error in the middle of the installation, then re-plug the phone, start over but this time put the AP file in the CP bin box and the CP file in AP box.

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-=How to get root=-

=1= (thanks gabrielecif)
To get root easy (no data wipe and original bootloader) go to these thread:
http://xdaforums.com/showthread.php?p=35138820#post35138820

=2= (thanks to RobYyY)
UNLOCKED BOOTLOADER+CWM6+ROOT
o2x-nvflash-bootloader_unlock_v30a+CWM6.zip
♦unzip attached archive
♦put your phone into nvflash mode(don't know how? use search button)
♦open "flash-boot.bat"
♦put again your phone into nvflash mode
♦open "cwm.bat"
♦boot into cwm and flash SuperSU Root.zip
♦reboot and enjoy
EDIT1: Root doesn't work with su303.zip i don't know why.. but i have made a zip with supersu and root is working. have fun(supersuroot.zip is attached)

=3= (thanks to joiN85)
-After you install with smartflash v30a rom, download and flash "Bootloader unlock ICS Official" and "Recovery 5.0.2.8e v30a Official"
-Flash with NVFlash: Recovery 5.0.2.8e v30a Official + Bootloader unlock ICS Official
-Go in cwm and install "Superuser-3.1.3-arm-signed-tradotto.zip"
-Reboot
-Now you have Root

IMPORTANT!!!
Some users have charging problems (while connect your phone to charge with screen on - it breaks)
It is becouse of root in some case, without root everything is ok. Need more fredbacks for this!

Credits to Daniel Aminov, he received the link (smartflash version from 4.12.12).

Yeah, i hope so too) Now i must go and I'll return in the evening, and downloading the firmware will be finished i think. Then I'll be able to say exactly.