yashsingh1/xdaforums huggingface dataset:
[LG Optimus 4X HD] @non4:
I forgot that step when i downgraded too, had to boot back up and read the thread again! In my case I had to pull battery and hold volume down again when I reconnected

Sent from my rooted P880
[LG Optimus 4X HD] issak:
your screen shot is little. i cant see any thing.

whats your problem?
[LG Optimus 4X HD] arararagi:
Is it possible to roll back without wiping data?

Also does anyone know if it's possible to run ICS with the new unlocked bootloader?
[LG Optimus 4X HD] RuedasLocas:
Once that you go back to v10x, everything changes. No unlocked BL.

To go back you need to use LGFlash tool and it does some kind of factory reset soo... keep data its not possible. And its not a good idea too.
[LG Optimus 4X HD] fcorazza:
This means that warranty on our phone will be still valid? (I've read that unlocking the bootloader voids the warranty).
[LG Optimus 4X HD] RuedasLocas:
If you go back to ICS the bootloader will be locked.
[LG Optimus 4X HD] hassan1990:
i cant download from mega is there a mirror for the files
[LG Optimus 4X HD] hassan1990:
i cant download from mega :crying: :crying:

is there another mirror for the files ?

:confused:
[LG Optimus 4X HD] @non4:
Use the links in this post: http://xdaforums.com/showthread.php?p=38838927

Sent from my rooted P880
[LG Optimus 4X HD] brunolmd:
Hello there,

I have a Brazilian 4x HD...it had v10e I think, the one that came with it...and I flashed v20a but I can't unlock the bootloader.

IF I do this method and go back to ICS, can I flash a v10a and then v20a and get the bootloader unlocked?

Please, I need to know that...it's killing me.

Thanx!

Great work, btw
[LG Optimus 4X HD] nedooo:
Well if you are too lazy just to read couple posts, than you'll die, since it's killing you...
[LG Optimus 4X HD] leolipop:
Me too getting error at 10% . Every single time of the 10 times i tried .
[LG Optimus 4X HD] RuedasLocas:
And you're using LGFlash Tool?
[LG Optimus 4X HD] leolipop:
Yes, i followed the procedure. The flashtool finds my port but every time error at 10% . I start the app with admin rights but no luck , always the same result. I tried restarting my pc but didn't help.
[LG Optimus 4X HD] RuedasLocas:
Try this, download the drivers, kdz-update folder and the dz files from post nr. 7.

reinstall the drivers, first the biggest package and after the smallest one, the modem driver.

connect the phone with the battery on while pressing vol- (SW mode).

use those .dll and .dz files to flash it.

Don't forget to select only the first active port you see

.Wrong, select the one that goes higher in %.

try V10H if you cant flash V20A. Don't forget that the .dll is different one from the other and use only one .dz file at the time (when one selected, remove the other)

you saw the video? might help...
[LG Optimus 4X HD] QuadBro:
Hi

Hi guys.in my PC,i have v10F kdz firmware for Turkey.My phone's firmware is v20B HK.How can i back v10F ? :confused:
[LG Optimus 4X HD] RuedasLocas:
Following the tutorial :)

If you need the V10H dz an .dll files they're in post nr7. Its euro_open but after that you can reflash your country version with your kdz.

Or, extract youself the .dz and .dll from the .kdz.
[LG Optimus 4X HD] QuadBro:
how can i extract them ?
[LG Optimus 4X HD] RuedasLocas:
Here you have one way how to do it:

http://xdaforums.com/showthread.php?t=2207786

You can use "UpTestEX_mod2_marwin" too... simulate a flash process. The program will create a temporary .cab file in same directory where

is the .kdz, before the program delete the .cab file you need to select it and copy to other location. After you just need to unpack the .cab file with winrar or winzip to extract the .dll and .dz files.
[LG Optimus 4X HD] QuadBro:
Thanks for your help man

:good:
[LG Optimus 4X HD] future81:
don't know if any1 needed to do this - but i had to uninstall driver reinstall while device not connected - connect it powered off without vol key to get windows to detect it and while it search for driver i disconnected it reconnect while pressing vol down - it detected lge cdma driver this way- yet the flash tool gives ready with no action so i uninstalled driver and while windows tries to reinstall it the flash tool detected it and started download
[LG Optimus 4X HD] bullghost:
HOW TO PROPER SELECT THE PORT on LGFlash Tool

this guide is for RuedasLocas method

1. when your phone enter the S/W mode the windows will automatic detect new hardware, and windows will found LG Modem

2. go to Device Manager disable that LG Modem ALSO you will saw the PORT being use by "LG Mobile USB Serial" on Ports(COM & LPT) section.

3. you got the LG Mobile USB Serial port, that port are we will going to use on LGFlash tool

hope its work with you guys
[LG Optimus 4X HD] tiflao:
What method work , SnXo or RuedasLocas?

Thx!
[LG Optimus 4X HD] darkren:
I have the same problem as e-53e what do i do? I have v20a atm
[LG Optimus 4X HD] SnXo:
both of the methods should work.
[LG Optimus 4X HD] RuedasLocas:
Soo... follow the thread, look for the given advices to @e-53e and probably you'll solve your issue :D
[LG Optimus 4X HD] future81:
post screen shots - do u run as windows administrator - whats your operating system - if you can try on another PC or windows
[LG Optimus 4X HD] @non4:
I had to run as admin, this is probably the most common cause of it not working, even if you're logged in as the admin you still need to choose this option for some reason

Sent from my rooted P880
[LG Optimus 4X HD] darkren:
7 and vista dual boot
[LG Optimus 4X HD] darkren:
Now everything worked but after ready when its updating its stays stuck at 10%.... plz help
[LG Optimus 4X HD] future81:
not sure but try this latest dll
[LG Optimus 4X HD] TomCarter21:
Help

Hi friend..

I wonder if there is some way to go in S / W upgrade by pressing another button

than the vol - is that mysteriously is shutting down and it just keeps getting worse :/
[LG Optimus 4X HD] RuedasLocas:
Only way to get in SW is using the vol-.

When the phone is ON, you have any issues with the vol- button? When changing volume for example?
[LG Optimus 4X HD] :
Do you have download link for the KDZ files from offical LG download site ?

Hi mate,

Do you have download link for the KDZ files from offical LG download site ?

I saw links for KDZ files somewhere on the forum that is located on the original LG download site . . . Do you know anything about it ?

Thanks in advance for your help.
[LG Optimus 4X HD] RuedasLocas:
Here:

http://lg-phone-firmware.com/index.php?id_mod=15
[LG Optimus 4X HD] :
Thanks . . . and one more thing

Thanks mate . . .

One (or two) more question(s). Since i upgraded my LG 4X HD P880 to new android 4.1 through LG offical tool (LGMobile Support Tool) i have less than half of a battery life that I had with Android 4.0 . . . Is it normal ??

Also I found that I do not have option in SECURITY settings to encrypt my phone. I have Samsung galaxy tab, with Android 4.0 and it have this option. Do you know is it possible to enable it on LG P880 ??

One mroe time, thanks for your help.
[LG Optimus 4X HD] RuedasLocas:
Security option looks that are "depending" on the device, like bootloader being unlockable or not... (my opinion...)

Battery drain generally is caused by the apps running in backgound (bloatware).

You can root your device and uninstall a lot of them. MLT, unwanted/unnecessary apps/widgets, etc...

Search for "battery drain" and you'll find some lists of secure removable apps. Choose those that you don't need and your phone

will have the same drain like in V10x. At least I do...
[LG Optimus 4X HD] :
Can you check on your phone, under security - do you have encrypt the phone option ??

I bought this phone just because I DO NOT want to root, hack, etc. :)) Just wanted to use the phone as it is and it worked beautifully with V4.0 . . . More than one full day with heavy duty use. I dont think I will root it . . . Prefer to roll back to android 4.0.
[LG Optimus 4X HD] TomCarter21:
Yes :/ I could do?
[LG Optimus 4X HD] RuedasLocas:
Sorry... didn't understood...

"Yes" what?

"I could do?" what?
[LG Optimus 4X HD] TomCarter21:
Yes, i have issues when I try to lower the volume, for example, listen to music .. I have to push pretty hard and I have yet to make several attempts..

How could I do then to update my phone to official jelly bean using your method?
[LG Optimus 4X HD] future81:
do this "I have to push pretty hard and I have yet to make several attempts" till you get sw upgrade mode
[LG Optimus 4X HD] RuedasLocas:
To use mine or OP method is easy, follow the tutorial, but for that you need to get in SW Mode...

The answer to that:
[LG Optimus 4X HD] TomCarter21:
So I finally enter S / W and introduced me this problem D:
[LG Optimus 4X HD] SnXo:
that isnt a problem, that are the download-mode and ur phone is flashing to v20a =)

greetings
[LG Optimus 4X HD] RuedasLocas:
Right :) Should take about 280 seconds ;)
[LG Optimus 4X HD] TomCarter21:
But the first time, it should appear three loading ports?
[LG Optimus 4X HD] RuedasLocas:
Yes, unless for some reason, the program had a port selected and just purely lucky was the one that you needed...

Selecting all ports you should see 3 ports on blue and the rest in red. Unless something is wrong with device detection.
[LG Optimus 4X HD] sgiedrius:
Finally

Finally I did it. My very limited knowledge and experience in Android was an obstacle but determination to own my phone and how i like it won.

Couple of things that might be useful for others:

1. I did not rooted phone and flashed to V20a without a problem.

2. Wanted to go back to V10h (dont ask, personal choice)

3. Could not root the phone being on V20a and had trouble to roll back according instructions here.

Flash would no go to yellow ready at all. I managed it either by changing USB cable and running as administrator LGflash and most likely LGflash set to compatible with Win XP

Then I would stuck downloading at 21% and the problem was I did it without battery in. Inserted battery and reached that lovely green Finished.

Thanks for you guys!
[LG Optimus 4X HD] sgiedrius:
Mega app for Android

I am using Mega app and it works fine.
[LG Optimus 4X HD] Ajmaldriod:
Please Help

I did it kdz update and now my phone wont boot... Please Help:crying:

---------- Post added at 07:04 AM ---------- Previous post was at 06:11 AM ----------

I am in Saudi Arabia and this is euro verison does it work
[LG Optimus 4X HD] future81:
you tried sw mode?

turn off phone and connect it to pc while pressing vol down - if you get sw upgrade on the screen then you can follow this guide either to go to jelly bean or ICS
[LG Optimus 4X HD] RuedasLocas:
Listen, even if something is different, it will fix your phone. After you can flash your official version with kdz.
[LG Optimus 4X HD] Oldchris:
downgrade

Probuje wrocic do JB4.0.3 z JB4.1.2, wykonuje wszystko zgodnie z opisem i nie uruchamia się okno z READY na aktywne.Robie to raz wedlug opisu a potem wedlug filmu i efekt ten sam.Wczesniej wykonałem flash z V10a do V20a-EUR i przebiegalo bez klopotow.

W opisie nie jest jasny dla mnie krok 10: W trybie działania wybierz Upgrade DL, gdzie to wybierac?: (
[LG Optimus 4X HD] RuedasLocas:
You should use English :)

Step 10 I think it is to select the .dll.

You can take a look at post nr. 7 and see if it's easier for you.
[LG Optimus 4X HD] hsafenix:
Hi,

I tried to flash cm10 into my p880, following other post from the forum.

Things I tried:

Using CWR from ROM Magager:

[LGE_SECURITY] ERROR: boot image signature

Critical failure: Unable to start kernel.

Unrecoverable bootloader error (0x00000002)

After reboot, it was back to normal.

tried to install the CWR from the post link

su

cat /mnt/sdcard/recovery.img >/dev/block/mmcblk0p1

sync

reboot

Same problem.

Using LG-Optimus-4XHD-Recovery-v1.2.zip (ClockworkMod Recovery v6.0.1.1):

factory/data/dalvik wipe...

--Installing /sdcard/cm-10.1-20130424-NIGHTLY-p880.zip

Finding update package...

Openng update package...

Installing update...

assert failed: getprop("ro.product.device") == "p880" || getprop("ro.build.product") == "p880"

E: Error in /sdcard/cm-10.1-20130424-NIGHTLY-p880.zip

(Status 7)

Installation aborted.

Also tried with external SD, same error.

Then I disabled the assert in the updatescript (just erased the line) and installed using LG-Optimus-4XHD-Recovery-v1.2.zip (ClockworkMod Recovery v6.0.1.1). It seemed to be successful, but when it rebooted I got the message:

[LGE_SECURITY] ERROR: boot image signature

Critical failure: Unable to start kernel.

Unrecoverable bootloader error (0x00000002)

But this time I'm stuck in this error.

Finally I tried to follow this post to restore the regular ROM. Installed the drivers, downloaded the ddl and the s/w, put the phone in S/W mode, set up the LGFlashTool, but when I click the yellow arrow nothing happens with the ports... I also noticed the MODEL and SUFFIX remain blank.

Did I miss something?
[LG Optimus 4X HD] RuedasLocas:
Before you hit "start" you need to enable all ports and see the one that is comunicating.

After select only that one. Watch the video, might helps. Pay attention to the guide.

No rush to don't miss any step, its easier than it looks.

To install CM10.1...

The best, after unlock the bootloader, its to install ROM Manager from PlayStore.

Follow the ROM Manager "guide" to install CWM and use it to flash CM10.1
[LG Optimus 4X HD] hsafenix:
First of all, thanks for replying so quickly!

I didn´t write it down in the first post, but I did select all ports before hitting the yellow arrow (I also watched the video :good:)

I made another test, clicked the arrow without the phone plugged. The same thing happens (nothing), The ports don´t get "READY". And also, in the video, the MODEL says "X3", in my screen (attached) it is blank.

It is like the phone is not installed at all, so I when to the device manager and it is there (attached) "LGE Mobile USB Serial Port".

The steps you described are really simple, I not sure what I am doing wrong..
[LG Optimus 4X HD] future81:
after clicking arrow try to uninstall usb to serial port driver from device manager - and press scan for new hardware - while windows try to reinstall driver flash tool should detect the port and start flashing

thats what i did
[LG Optimus 4X HD] hsafenix:
I set the dll, the s/w, checked all the ports, clicked in the arrow, same problem, opened the device manager, uninstalled the LGE Mobile USB Serial Port, scanned and it re-installed automatically. But nothing happened in the Flash tool.

I'm in Windows 8, this can be a problem?
[LG Optimus 4X HD] future81:
maybe- try disconnect phone reconnect are you running program as administrator?
[LG Optimus 4X HD] SnXo:
I´ve seen on one pic from u that in Model Config menu you have set the connection mode UART thats wrong!!!! U have to set on USB

greetings
[LG Optimus 4X HD] hsafenix:
Thanks! I knew it was something stupid! I just ran as Admin and it worked!

You guys are the best! Tomorrow I´ll try again to make CM10 work
[LG Optimus 4X HD] vinnong:
Hi, will bootloader remain unlocked if I rollback to 4.0.4?

Tia
[LG Optimus 4X HD] @non4:
Yes, but only in JB, ICS will not recognise the unlock

Sent from my rooted P880
[LG Optimus 4X HD] tabator:
downgrade from 4.2.2 to stock JB LG rom?

Is it procedure to downgrade from 4.2.2 to stock JB LG rom?:confused:

thanks in advance...
[LG Optimus 4X HD] @non4:
Yes and no. You can use this method, but flashing with any other tool will work if you're flashing to official 4.1.2. If you want to use 4.0.3 then this is the only working method. In future take a nandroid backup

Sent from my rooted P880
[LG Optimus 4X HD] zujko:
Does the battery lasts longer on ICS?

Beacuse the battery on JB stock- custom, is very very bad..
[LG Optimus 4X HD] @non4:
Its actually alright if you disable Google backup transport, otherwise its just as bad

Sent from my rooted P880
[LG Optimus 4X HD] osprey23:
SnXo

Thank you for the instructions. I managed to downgrade to v10 and upgrade to v20 using your method.

However, the LG Flash Tool needs to be run as an Adminstrator, otherwise it would not work. I found out the hard way. May be you can consider adding this to your instructions as more people will be using Windows 7 and Windows 8 which would be a problem.

Cheers!
[LG Optimus 4X HD] shadowcore:
Yes, and dont forget LG MLT. A big battery eater and it logs everything you do on your phone, as has been reported in our forum.
[LG Optimus 4X HD] eljose007:
Need to be the same downgrade version?

HI, I upgrade to jb 20b from 10d y think... I need to use the same version (10d)? or can I use the 10h for example? Thanks! and sorry mi bad english
[LG Optimus 4X HD] salmonpar:
Battery does last longer when rolled back to stock ics so yes to your question.
[LG Optimus 4X HD] 33bca:
Nice :good:
[LG Optimus 4X HD] WeeJockMacFeegle:
I get Download FAIL!! (17 sec) every time I try this.

I've followed the instructions exactly.

Any idea's?
[LG Optimus 4X HD] RuedasLocas:
Try other USB port or other computer...

Can be a few things, basically a cmunication problem between the device and the program.

Can be the drivers, usb issues, etc... you tryed to take out the battery and put it back again?

My only advice is to, "be creative".

Try to change usb port number (on the program), see if you have the right .dll, check everything.

Good luck
[LG Optimus 4X HD] Invicta:
hi guys, i have a weird issue. I cant open LGflashtool, due to an error in windows "side by side confg. is wrong etc", i googled and nothing came up...
[LG Optimus 4X HD] dimi89:
[MENTION=2370086]Invicta[/MENTION] only thing i can think right now is to ask you if you were starting it as administrator ? If not try that way..
[LG Optimus 4X HD] Invicta:
ran as admin, nothing happened.,.
[LG Optimus 4X HD] Invicta:
got it, it was a 2008 C++ redistributable file missing...
[LG Optimus 4X HD] RuedasLocas:
del
[LG Optimus 4X HD] medseven:
Will this work to go from Eternity Project's Unofficial Cyanogen mod (the one that came out way before the official nightlies that didn't need unlocked bootloader) to a stock rom?

Edit: NVM I used the KDZ option!
[LG Optimus 4X HD] BelAddams:
After several struggles, I managed to update using another computer.

BTW, in the post #7 you said if only 1 port showed up it probably wouldn't work, but it did work for me. thanks a lot!
[LG Optimus 4X HD] RuedasLocas:
I said "probably"... sometimes even with 3 ports doesn't work for some users.

Thats why I use to say that people need to be "creative" :)

Computer OS and installed programs also matters, thats why sometimes is hard to identify why the process works for some and not for others...

Happy that worked for you ;)
[LG Optimus 4X HD] @non4:
That's why I said method 1 is more reliable, because you get deeper into the system and force it to use port 1. However if it had worked for me your method would be so much easier, so I would say try your method first then if it doesn't work try the original more complicated method ;)
[LG Optimus 4X HD] DemetriK:
del
[LG Optimus 4X HD] mihuts:
works like a charm

i've just finished with the rollback by the method from the 1st post. When u 1st start the downloading mode be sure that u don't release the volume down button too soon, cause the device will never install the USB drivers needed to communicate further with the computer to download what it needs. After I figured that, everything else went perfect. Thank you for this guide. My phone is now awesome again !
[LG Optimus 4X HD] markfree:
Tried and didn't see my phone
[LG Optimus 4X HD] RuedasLocas:
I tried doing the steps above and whenever I selected the ports on LGFlashTool it did not communicated with any port.

All the ports simply didn't respond.

I manually changed the Lg com port to "com41" at device manager and yet it didn't work.

Do you guys have any idea?

Thanks[/QUOTE]

If the program don't detect the device is because there is something wrong with drivers, msxml, Windows Enabler, or other...

LG PC Suite detects your phone?

Try to re-install the drivers, after that connect the phone in SW mode in other usb port.

Be sure that msxml is installed and Windows Enabler running "ON".

Good luck
[LG Optimus 4X HD] lmilan:
Sorry, but for me this dont work :/ i run it as an administrator, all 16 ports ar selected (COM1),connection mode is UART, phone is in S/W mode, but when i start it, all the ports are red, and nothing happens :( if i turn it to COM41 in device manager, the connection mode to usb, and only use port 1, only the "ready" messeage is shown... i dont know what to do
[LG Optimus 4X HD] sPEADy:
I would say that you repeat each step carefully from post 1 try to connect the phone without battery and insert the battery as soon the lg logo appears on the phone after that wait a little so that windows is able to install the drivers. If it does not work on one usb port try another one or you can also try it on another pc.

Good Luck.
[LG Optimus 4X HD] lmilan:
I tried with another usb port, but i can only change the number of ports, when i run as administrator...but i cannot change connectoin mode to uart that way. but if i run the program normally, only the changes from administrator mode are shown, and i cant change a single thing, but is can select uart, but when i close the options window, all changes are reverted back
[LG Optimus 4X HD] SnXo:
Excuse me but you have to change from uart to usb mode if usb is unavailable then try to start the app with admin rights... And if the prog say's you have unplug the usb connector and after 2 seconds replug the program starts automatically...
[LG Optimus 4X HD] wisage:
Thanks mate, your method work's fine with me!
[LG Optimus 4X HD] spok11:
Mate you are a genius!!!!Followed everything step by step and it worked like a charm...thank's to you my phone is now running back to the stock ICS and also exactly the stock AT ICS that i needed:D!!!!
[LG Optimus 4X HD] SunHounD:
Thanks

Followed your guide, and it worked like a charm. i now use the same method to both upgrade/downgrade at will, without any problems.

the only problems i did encounter, was the flash tool not recognising my phone, but just swapping usb ports fixed that.

As i said, this method works both for upgrading/downgrading....only difference was, when flashing, i used X3_v0.0.7.4.dll for flashing v20A and X3_2008_v0.0.6.9.dll for v10H

THANKS

And before you call me on "writing" thanks, i already hit the THANKS button :silly:
[LG Optimus 4X HD] TheNoticer:
I updated my 04XHD via LG MobileSupport Tool. That means I have the drivers. The FlashTool doesnt need any admin rights. Do I need any admin rights to rollback? I dont have permission to change the usb thing do I have to this?

Any other option to rollback like MobileOdin (flash tool apk for samsung jandsets)
[LG Optimus 4X HD] dimi89:
Yes you need to change it.Run it as administator then change it and try again.
[LG Optimus 4X HD] lukas2485:
Stuck in S/W Upgrade mode

Hello guys!

I followed your instructions but now when I plug in my phone again to start the download the download gets stuck at 10 %.

When I restart my phone i automatically puts me into S/W Upgrade mode.

I downloaded the latest drivers Windows enabler is on. Flash Tool runs with admin rights.

Please help me. I don´t know what to do anymore. :p
[LG Optimus 4X HD] lukas2485:
It works :)

Hello again!

after uninstalling/reinstalling all drivers and changing the USB- Port it works just fine! :laugh:
[LG Optimus 4X HD] rico2825:
does this also work when i coming from 4.3 carbon rom

cause i am still running baseband 20a but want to go to baseband 20b

regards
[LG Optimus 4X HD] sPEADy:
Yes it does work I personally tested it about a week ago just follow the instructions carefully and it works like a charm. Good luck.

Like what I said hit " Thanks" Button.
[LG Optimus 4X HD] rico2825:
i just flashed the germany 20b.kdz with kdz flasher over carbon rom then i got stock rom again and rooted again installed cwm recovery and installed carbon rom again now i have 20b baseband ;)
[LG Optimus 4X HD] dimi89:
And you could do it in 1 less step by flashing streight away 20b germa or open euro rom and then root it and install cwm and flash carbon rom ;)
[LG Optimus 4X HD] rico2825:
Thats exactly what i did ;)