How to downgrade from V20n back to V10a? - LG Optimus Black

I wanted to install the zeus v1 from huexxx but my current v20n cannot be rooted..

You have 2 options:
1) kdz updater (search for it in this forum)
2)http://forum.xda-developers.com/showthread.php?t=1448803

http://forum.xda-developers.com/showthread.php?t=1448803

Closed.
Answers provided - that could have been found via searching.

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lg optimus 2x upgraded and downgraded successfully

Hi,
I have LG 2X P990(Indian stock ROM V10B).Few days back i have successfully upgraded my cell with Europian stock ROM V20L(official/leaked)....over V10e -725 BB...using KDZ updater....having V20L_00.kdz file..
Upgrade was nice but ih has problem with 3G data connection...it connect with long delay....
Today i flash back again my P990 to V10E-FRG83G-1035.21_20110725. I downloaded it also from XDA-developer....but this time i flashed it with Smartflash software...in which i have to select 2 extrected files .bin and .fls
BIN_LGP990AT-00-V10e-ESA-XXX-AUG-01-2011_0.zip.......
Please see procedure to flash the mobile...in XDA developer forum...
To be honest you really need to put Clockworkmod Recovery on there and using that to change the firmware. You can find instructions here although there are probably some on these forums as well.
I would then recommend either trying a firmware such as CM7 or something like Wiui. There are plenty of roms based on the official releases as well and they can be found both here and on MoDaCo.
.
Thread moved. Would advise you to read forum rules and post in correct section.
Failure to comply with forum rules will result in an infraction and/or ban depending on severity of rule break.
Can u post link of tutorial that u followed for flashing kdz?

Gingerbread v20l stock kernel

Hi guys.
I couldn't find "Search" textbox/button, so i will ask here. Sorry for the new thread.
I have Stock Gingerbread V20L v2.3.4.
Since the update, i have tried many kernels, and i came to the conclusion that stock kernel suits best for me, but i can't find a tutorial about how to flash, or download link, or something.
Can i get some help? Thanksies.
Code:
http://forum.xda-developers.com/showthread.php?t=1035041

Cant install gingerbread kdz v20n

hi guys , i'm new here and i'm a noob to android. I followed all the steps here: http://forum.xda-developers.com/showthread.php?t=1287236 and at the last but one step i think i'm stuck , the lg mobile support tool appears and i cant update the phone , it says "The Cell phone is the latest version already. So you don't need to update." So i cant update , i changed the country and it wont work . What should i do please tell me ? i have 2.2.2 v10b. THANKS IN ADVANCE!
raduku009 said:
hi guys , i'm new here and i'm a noob to android. I followed all the steps here: http://forum.xda-developers.com/showthread.php?t=1287236 and at the last but one step i think i'm stuck , the lg mobile support tool appears and i cant update the phone , it says "The Cell phone is the latest version already. So you don't need to update." So i cant update , i changed the country and it wont work . What should i do please tell me ? i have 2.2.2 v10b. THANKS IN ADVANCE!
Click to expand...
Click to collapse
I hope you got, that this was a thread in O3D Optimus 3D Forum... Anyway, if you want a stock Rom, just use R&D tool (use search) and read the first post http://forum.xda-developers.com/showthread.php?t=1111771 and then read my reply http://forum.xda-developers.com/showpost.php?p=22237122&postcount=449 and you will be able to flash v20x. Being noob doesnt mean u ll get a step by step guide, so do some reading pls. If you want a custom rom, also go to first thread, download the pack, use blackjack to root or search for root v10x where x is your version and then use CWM.exe (or similar) to install CWM or do it by RomManager! Then download a custrom from Dev Section and havbe fun
i dont understand , where can i find the r&d tool?
In the Package, I posted the link to above! Download the Package and you will find it: http://forum.xda-developers.com/showthread.php?t=1111771
ok i will download it in 5 min. What should i do with it ?
ok , so i downloaded open the r&d tool , but cant select anything why that?
im sorry for multi-posting but i tried and i gets the same , after i press the upgrade button , the lg mobile update support appears again X( X( it pisses me OFF it says the same thing , that i have the latest version (2.2.2) what should i do pls ? thanks in advance!
Did you follow this as well?
http://forum.xda-developers.com/showpost.php?p=22237122&postcount=449
If not, do it, if you did, you can still try this: http://forum.xda-developers.com/showthread.php?t=1448803
And take the files from here: http://forum.xda-developers.com/showthread.php?t=1480392
And flash em, but watch out this will void ur guarantee!!!!!!
ok man i'll try tomorrow , i'm tired right now. Many thanks for this, i will tell you if smth gone wrong or succeed.
I solved the problem with this tutorial:
http://forum.xda-developers.com/showthread.php?t=1473781
True.. I always forget about it... but I think it might be too complicated for him anyway Dont know about his skills...
i tried that before i posted this thread.. the lg mobile support tells me that i have no connection to the internet , so i cant update X(
I bet you did anything wrong, dont know what, but just go here: http://forum.xda-developers.com/showthread.php?t=1487105 Read it all! Root your phone, install Zeus and be happy ever after
i just want gingerbread 2.3.4 v20n and then to root it , so then i can overclock for more performance in games.
raduku009 said:
i just want gingerbread 2.3.4 v20n and then to root it , so then i can overclock for more performance in games.
Click to expand...
Click to collapse
U CANNOT overclock V20n! You need Nova ROM to do this, and this is only 2.2... So better think about it again Root your phone now, and then install Zeus, it is v20n, but modified, to be faster...
why not ? set cpu does not work on gb ?
raduku009 said:
why not ? set cpu does not work on gb ?
Click to expand...
Click to collapse
u need a custom kernel that allows it!
stock kernel don't have OC enabled
so what do i have to do ?
raduku009 said:
so what do i have to do ?
Click to expand...
Click to collapse
A kernel!
Regards,
Me
Sent from my LG-P970 using Tapatalk
**** i'm stupid i really dont understand anything with this tutorials

[Q] Root LG Optimus P970h 2.3

I've tryed SuperOneClick, Esteem and Gingerbreak without any luck. None of those seem to gain access to root files.
I dont want flashed ROMs, I got official 2.3.4 (V20A firmware) update and just want to get root access to fix the button lights and some other stuff.
Please Help, Thank you!
(and Yes, I searched this forum without any luck)
If you have searched and not found, it is not prompting you to think that this is not possible?
It is possible, just that he doesn't know how to search properly.
Trolling in the deep
I do think it is possible, but this firmware has been recently released so there may be less people asking about this.
Search for cwm injection method. This should also work with p970h
Sent from my LG-P970 using Tapatalk
N00BY0815 said:
Search for cwm injection method. This should also work with p970h
Sent from my LG-P970 using Tapatalk
Click to expand...
Click to collapse
I will try but I don't have a file with the official ROM. I just updated through the lg software.
Argaroth said:
I will try but I don't have a file with the official ROM. I just updated through the lg software.
Click to expand...
Click to collapse
You can also inject the official updater. You dont need r&d tool, just select the other process of lg updater tool. Then you get root with the same method. Or flash v10a with smartflash, root it with gingerbreak.apk and then install a custom rom. Thats probably the easiest way.
Sent from my LG-P970 using Tapatalk
Thank you for your answers, UnlockRoot 2.3 did the trick. Now my phone is rooted!
You can close this post...

[Q] Rooting V30B official ICS for P970

I apologize if this question has already been answered but i did search the forum and couldn't find anything...
i've flashed the official LG P970 ICS V30B and thus unrooted my phone. how can i root it again (except using unlock root - i'm looking for a free method)
thank you!
zenzaman said:
I apologize if this question has already been answered but i did search the forum and couldn't find anything...
i've flashed the official LG P970 ICS V30B and thus unrooted my phone. how can i root it again (except using unlock root - i'm looking for a free method)
thank you!
Click to expand...
Click to collapse
UnlockRoot is free, as I'm still using it whenever I need to flash stock ICS... :S
perhaps it was free? unlockroot[.]org
i did install it and keeps asking me for a serial number...
after some more searching i found a 4shared archive with unlockroot v2.3 that worked and didn't ask for any serial. :good:
although, yet i have a confirmed root access, i can't seem to edit the phone's ringtones (tried to copy a couple of ringtones in its default device folder and keep getting an error)...

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