Rollback Optimus 4X HD from 4.1.2 JellyBean to 4.0.3 Stock ICS

SnXo

Senior Member
Feb 10, 2013
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Rollback Optimus 4X HD from 4.1.2 JellyBean to 4.0.3 Stock ICS in this case V10H

Videotutorial: http://www.youtube.com/watch?v=NDyZ8pH2jp0

1st: U need are the files that you get here: LG FlashTool and Accessories

2nd: Install the LGUnitedMobileDriver (first LGUnitedMobileDriver_S4981CAN36AP22_ML_WHQL_Ver_3[1].6 & 2nd LGUnitedMobileDriver_S4981MAN36AP22_ML_WHQL_Ver_3[1].6)

3: Turn Off your Mobile and remove your SD and Sim-Card

4: Press volumen down and put in your USB-Cable

5: When your computer detect, it installs the driver

6: After Driver installation, go to device manager select “LGE CDMA USB SERIAL PORT” right click properties then connection setting advanced and set to “com41″

7: After that run LG FlashTool

8: Select in DLL the x3_2008_v0.0.6.9.dll

9: In S/W select only the LGP880.dz file that i´ve added in dz and dll file folder

10: In Action Mode select Upgrade DL

11: in Connection Mode select USB

12: Click on OK

13: Click on Port COM settings (COM plug icon) and select 1 ( Unmark the numbers above )

14: Click start(The Port 1 window should appear READY)

15: Disconnects USB cable and wait 5 seconds

16: Press and hold voll down button in Lg P880 and connect USB cable

17: The update process will begin automatically after that release the Vol down

18: When the progress reaches 100%, the mobile will power on and boots automatically into ICS!

19: Congratulation you did it ;)

20: Now u can Flash v20a again :p


hopfully that helps to rollback for those they want.

a thanks would be great

dont forget to thanks xavierleonelbr from his guide i´ve get some parts ;)

Some other DZ-Files to flash with LG-Flashtool:

LGP880AT-00-V10a-EUR-XXX-MAY-23-2012

LGP880AT-00-V10b-262-000-Jun-11-2012

LGP880AT-00-V10d-EUR-XXX-JUL-16-2012

LGP880AT-00-V20a-EUR-XXX-MAR-04-2013

LGP880AT-00-V20a-BUM-XXX-MAR-05-2013 CN

LGP880AT-00-V20a-262-000-MAR-26-2013 ADEUBK


Warning and notes:

Do not forget backup your apps, pictures, contacts etc. Flash with LGFlashTool will erase all data on the phone!

Disable Windows Enabler when its running from a season before with the KDZ-Update-tool! It wouldnt work!

Be sure you have the propper driver instaled and chosed the right options in the comport settings!
 
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Turbol

Senior Member
Mar 1, 2013
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Rollback Optimus 4X HD from 4.1.2 JellyBean to 4.0.3 Stock ICS in this case V10H

16: Press and hold voll down button in Lg P880 and connect USB cable

17: The update process will begin automatically after that release the Vol Up
so hold vol down or vol up ?

so change :D
in point 17 you have after release VOL UP
should be vol down
 
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SnXo

Senior Member
Feb 10, 2013
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Sorry for this dummy mistake...Vol down when u plugin the USB cable...i`ve editet...thx for telling me :thumbsup:

Sent from my LG-P880 using XDA Premium HD app
 
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RuedasLocas

Senior Member
Aug 12, 2012
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Easyest way...

To go back to previous firmware (ICS V10x_00) with LGFlash Tool there is no need to invent in device properties
or others...
The same methode can be used to do a clean install of the V20A, or other...

Internal memory will be wiped !!!

Be sure that you have the latest drivers installed:
http://www.4shared.com/file/rPpP2btT/LGUnitedMobileDriver_S4981MAN3.html
http://www.4shared.com/file/ZSMf2x6n/LGUSBModemDriver_Eng_WHQL_Ver_.html

kdz-update: (updated 08-09-2015)
http://www.4shared.com/rar/mo5bLPRcce/kdz-udpate.htmll

install "msxml" (its inside the "kdz-update" folder).

run windows enabler and turn it ON

With battery on the phone and the phone off, press "VOL-" and connect the phone
to the computer while pressing, you'll be in S/W. (If you have issues due the device
being recognized while in S/W Mode, disconnect from PC, take out the battery and
put it back again on the phone, try again "Vol- & connect to PC", wait a few seconds
for Windows to recognize the device).

Run "LGFlashTool" (its inside the "kdz-upload" folder).
select the .dz and the .dll

Official euro_open V20A_00 .dz and .dll:
LGP880AT-00-V20a-262-000-MAR-26-2013+0
http://www.4shared.com/rar/i5muvxCb/LGP880AT-00-V20a-262-000-MAR-2.html

Official euro_open V10H_00 .dz and .dll:
http://www.4shared.com/rar/LruGBo2Z/V10H_00_dzdll.html

View attachment 1784755

Go to "port settings" and select all 16 ports.
View attachment 1784756

Start the upgrade clicking in the yellow arrow on the top/left of the program window.
Three (3) ports will look like comunicating (in the next image you'll see only two cause I'm not really flashing), but
only one is the right one. Two of them will stay stucked in x% and a third port will go higher. Memorize the one that goes higher cause is that one.

In my case, this time was the nr. 3.
View attachment 1784757

Close the program and re-start it. This time, go to "port settings" and select only the port that you memorized,
start the upgrade and you just need to wait for the phone to reboot.
In case of that port fails, choose one of the other two untill you hit the good one.
If you don't see 3 ports, its something wrong and probably this won't work...
Easy :D

To set manually the port to "1", connect the phone in S/W Mode, open windows "Device Manager",
select “LGE CDMA USB Serial Port”, right click in "properties", connection settings advanced and set it to “com41″


Video added:
(select full screen and 1080p for better resolution)

Report if something doesn't work ;)

This post was edited cause I realise that is not always the first port the right one, sorry...
 
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Norse_Viking

Member
Aug 18, 2012
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not able to to do this step: After Driver installation, go to device manager select “LGE CDMA USB SERIAL PORT” right click properties then connection setting advanced and set to “com41″

can't find connection setting advanced, im running win8 64bit
 

RuedasLocas

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Aug 12, 2012
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Norse_Viking

Member
Aug 18, 2012
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silly me... had to run lgflashtool as admin

did not work either, only got 1 port active, and it failed to download the file to my phone
 
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