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How can i root if i update oficial 21c?

I ****ed up. I dont know what to do.
I updated my phone with LG launcher. Now i have newest C version. How can i root my phone now? And after this my phones internal memory has 0 free space. HOW? i dont understand. i didnt instaled anything. and i cannot root. i tryed everything.

Reflash you cellphone
I think you will have to re-flash using the KDZ file & LG flash too.
Then you can root it using megatron.
You can use v21E baseband(if you like) from the link below:
http://forum.xda-developers.com/showthread.php?t=1635011&highlight=v21e+kdz

aki_cs_ipec said:
I think you will have to re-flash using the KDZ file & LG flash too.
Then you can root it using megatron.
You can use v21E baseband(if you like) from the link below:
http://forum.xda-developers.com/showthread.php?t=1635011&highlight=v21e+kdz
Click to expand...
Click to collapse
is it newest baseband?
I was trying to reflash, but i cannot flash KDZ file, becouse it automaticaly connects to oficial LG server and downloads the new update.
And i need baseband for Europe.

[Q] Help flashing official ICS

Hi people, ive flashed the v28b bin through LG flashtool but the phone does not boot. it Just hangs on the LG logo and thats it. I cant flash through the KDZ method because the KDZ firmware updater application keeps crashing after it extracts the KDZ. I've also tried to update through the LG software update tool but it says the software i havde is the latest one. Any help would be appreciated

naz86 said:
Hi people, ive flashed the v28b bin through LG flashtool but the phone does not boot. it Just hangs on the LG logo and thats it. I cant flash through the KDZ method because the KDZ firmware updater application keeps crashing after it extracts the KDZ. I've also tried to update through the LG software update tool but it says the software i havde is the latest one. Any help would be appreciated
Click to expand...
Click to collapse
Just try egain, dont flash bin and fls files at same time, just flash only bin alone and wait until you get 100% in flashtool, at that time the phone will boot itself.

i managed to get it to come on after flashing it about 10 times but then i came across another problem. I got no signal and the phone would just shut down on its own after 5 mins say so i flashed xbsa's V7 rom and now the phone wont boot again. its driving me crazy!

READ THE GUIDE STEP BY STEP and it will work
Send from my XBSA ICS V7.1 P920.

xbsall said:
READ THE GUIDE STEP BY STEP and it will work
Send from my XBSA ICS V7.1 P920.
Click to expand...
Click to collapse
I have, when i flash the V21EBOOT.bin it works fine and the phone switches on but this one seems to stick at the LG logo. It did eventually come on after flashing it over and over but then would just shut down automatically and no signal. When i flashed your rom on top it doesnt start up. Im going to flash again when i get home from work but this time without the CP file and hopefully that will work

try to flash the Korean version first with LG flash tool then restore factory settings by pressing ( HOME, VOL + and POWER button ) at the same time then flash official ICS V28b with LG Flash tool
use LG ROM CONVERTER to convert .kdz rom to .bin and .fls rom ( for easier flashing )
i did these steps and the phone woking fine

mktns said:
try to flash the Korean version first with LG flash tool then restore factory settings by pressing ( HOME, VOL + and POWER button ) at the same time then flash official ICS V28b with LG Flash tool
use LG ROM CONVERTER to convert .kdz rom to .bin and .fls rom ( for easier flashing )
i did these steps and the phone woking fine
Click to expand...
Click to collapse
Yeah i guess i could try that, the XBSA404.bin worked when i flashed that previously. I have been flashing V28Broot.bin from xbsa instead of the official one but i'll try the official one instead

[Q] SU 760 downgraded from ICS to Froyo

Hi all,
I was for 6 months waiting for ICS for my SU 760 , finally it arrived, but when i updated it to ICS ofcourse the features are great but my phone became slow by 50 % sometimes even worse, i used task manager killer apps and memory boosts what not but still performance was sluggish, the phone used to crawl.
So thanks to XBSALL , i finally resurrected my phone from recovery mode and flashed it back to 2.2.2 froyo,
http://forum.xda-developers.com/showthread.php?t=1942836
phone works perfect, no problems what so ever its now on v10E, but i want gingerbread rom for it , but all the cgsm.lgmobile download links for v20f Gingerbread firmware links are down or i am not authorised to download.
Can some one give me a v20f stock firmware link and tell me how can i flash it to my SU760, before i used LG flasher with zip file, the zip file had .bin and corresponding dll file in it.
But i dont know how to convert KDZ to bin and get corresponding DLL for v20f in order to flash again
1. So if some one can give me v20f su760 zip file with .bin firmware and dll file in it or KDZ file ?
2. How to convert kdz to bin file in order to flash or how can i flash KDZ file directly ?
3. What is the best most fast and stable rom for SU760, could be stock or custom CM or prometheus or by xbs all or iblumind, which is the best ?
Thanks in advance,
Suhail

update this thread please help us i have the same problem

Hey guys,
so lets up or downgrade your phones =)
first http://lg-phone-firmware.com/firmware-Lg+Optimus+3D-Tutti-2.html <<< here are your KDZ´s . Download it =)
then follow this tread http://forum.xda-developers.com/showthread.php?t=2265363. You have to use the "Other Mode KDZ_FW_UPD", the last one.
have fun good luck, if you have questions ? ASK ! =)

Stock Everything Stock

I don't understand these directions from the FAQ:
"Q. How to get back to stock? I need to give my phone to warranty services how do I revert to official LG rom?
A. Check this thread. It is the v10b 2.2 stock rom as a flashable zip package. If you can't access the recovery, then see if the firmware for your country is available here or use this tool. Download the firmware and use the KDZ tool to flash. You will find instructions to use the KDZ tool on this thread. For a picture guide, check this thread.
Also for official GB lovers, see this and this. It is a v20g rom in flashable zip package. Or if you'd rather flash v20c/g roms from LGMDP, the links for that can be found in this thread.
If you are on Optimus V, see http://forum.xda-developers.com/show....php?t=1025911
If you are on the Optimus T, see this post. Uses the KDZ method.
Q. How do I restore the stock recovery?
A. Download the original recovery zip file from here and flash it. (Yes, you can flash a recovery from within recovery itself)"
I have LG P500 from USA T-Mobile. I'm on V20 Baseband.
1)Is kdz the only way to go back to stock?
2)Which way is the safer and better way to get back to stock?
3)How (full instructions) to get back to stock rom for USA T-Mobile?
4)How (full instructions) to get back to stock recovery for USA T-Mobile?

yes you can flash a recovery from recovery, if it is a flashable zip
you need to stick with your phone not other variants of LG p500, O-1(Europe), O-T or O-V, dunno what is the T-mobile USA version, but is it written inside your phone under battery
1) KDZ is for flashing software in your phone, but beware, if you are unexperienced you may brick your phone for good, but you can try it, DO NOT PULL OUT BATTERY OR DO SOMETHING WHILE KDZ IS NOT FINISHED FLASHING PHONE OR YOU WILL HARDBRICK IT (but, I do not think someone at service will notice that, after a hardbrick, it just went dead and nothing else, nobody knows nothing)
2)if you do not know what are you doing, nothing is safe, anyway, as I mentioned, a hardbrick is a hardbrick and if you still have warranty, you are lucky
3)http://forum.xda-developers.com/showthread.php?t=1824618 search there
4) LG P500 doesn't have stock recovery(just bootloader)
if you do not know what to flash try to find a T-mobile rom image (MAKE A REQUEST-someone will post it), and first time when flashing a recovery is to backup original rom for what will come after
LGMDP will work like this, it upgrades rom when you have an older version, so try to flash an older custom rom, find an Froyo 2.2 and flash it as any custom rom, boot, conect your phone to PC, that means that you have LG USB drivers installed, start LGMDP and w8 to detect your phone, after that goto options & help, select country, carrier, phone, w8 to detect latest update, start update
in case that your phone is not detected, boot into recovery, goto mounts and mount USB, that will make LGMDP detect your phone, start updating

androiddownloader said:
I don't understand these directions from the FAQ:
"Q. How to get back to stock? I need to give my phone to warranty services how do I revert to official LG rom?
A. Check this thread. It is the v10b 2.2 stock rom as a flashable zip package. If you can't access the recovery, then see if the firmware for your country is available here or use this tool. Download the firmware and use the KDZ tool to flash. You will find instructions to use the KDZ tool on this thread. For a picture guide, check this thread.
Also for official GB lovers, see this and this. It is a v20g rom in flashable zip package. Or if you'd rather flash v20c/g roms from LGMDP, the links for that can be found in this thread.
If you are on Optimus V, see http://forum.xda-developers.com/show....php?t=1025911
If you are on the Optimus T, see this post. Uses the KDZ method.
Q. How do I restore the stock recovery?
A. Download the original recovery zip file from here and flash it. (Yes, you can flash a recovery from within recovery itself)"
I have LG P500 from USA T-Mobile. I'm on V20 Baseband.
1)Is kdz the only way to go back to stock?
2)Which way is the safer and better way to get back to stock?
3)How (full instructions) to get back to stock rom for USA T-Mobile?
4)How (full instructions) to get back to stock recovery for USA T-Mobile?
Click to expand...
Click to collapse
KDZ is generally discouraged . However if you can find a Nandroid back up of GB , then that would be the safest way . I went back to stock froyo with the help of this thread - http://forum.xda-developers.com/showthread.php?t=1955354

sarans1987 said:
KDZ is generally discouraged . However if you can find a Nandroid back up of GB , then that would be the safest way . I went back to stock froyo with the help of this thread - http://forum.xda-developers.com/showthread.php?t=1955354
Click to expand...
Click to collapse
Thank you, i can just use that other download on the thread if i have the new baseband right? and what about removing cwm? or restoring stock recovery even though there wasnt before

androiddownloader said:
Thank you, i can just use that other download on the thread if i have the new baseband right? and what about removing cwm? or restoring stock recovery even though there wasnt before
Click to expand...
Click to collapse
Your have V20 that is new baseband so any rom from GingerBread onwards is good for you . Stock recovery can be flashed sitting right from custom recovery . Check out this thread for custom recovery and ROM of 2.3.3 - http://forum.xda-developers.com/showthread.php?t=1309744 . If you wanna try lgmdp look at this - http://forum.xda-developers.com/showthread.php?t=1324105

how to revert from lollipop to any kitkat rom

I installed recently lollipop stock firmware and I want to revert to kitkat in order to install the recovery and flash the future v3.2 rom.
I tried flashing 2 different kdz firmware (10b and 10f) through download mode and the process is completed successfully 100% but the phone goes into reboot loop on both versions.
how can I revert to any kitkat rom ?

Any help guys?

Use LG Flash Tool 2014, select CSE Flash instead of Normal Flash, work for me downgrading lolipop to kitkat without any problem.

follow these instructions
http://forum.xda-developers.com/showthread.php?t=2785089
to be able to go to download mode,
turn off your phone
wait 10s
press volume up and connect the usb cable (without pressing the power button)
it will work without problem if you have the correct lg drive install in your computer.
I just spent +4 hours how to do it, and was able to. now I am in kitkat

mosh11 said:
I installed recently lollipop stock firmware and I want to revert to kitkat in order to install the recovery and flash the future v3.2 rom.
I tried flashing 2 different kdz firmware (10b and 10f) through download mode and the process is completed successfully 100% but the phone goes into reboot loop on both versions.
how can I revert to any kitkat rom ?
Click to expand...
Click to collapse
After Downgrade from Lollipop to Kitkat via KDZ:
Remove the Battery and make a Factory Reset with the Hardware Buttons,this works.

mosh11 said:
I tried flashing 2 different kdz firmware (10b and 10f) through download mode and the process is completed successfully 100% but the phone goes into reboot loop on both versions.
Click to expand...
Click to collapse
Use CSE flash not NORMAL in LG Flash Tool 2014 and everything will be OK...
Here are the instructions: http://forum.xda-developers.com/showthread.php?t=2797190
Read them carefully and go step by step. This is really easy...
Sent from my LG G Pro 2

kitkat kdz plz........
could you please give the kdz link,
i want to downgrade my g pro 2 but don't have stock kdz

asar-bhai said:
could you please give the kdz link,
i want to downgrade my g pro 2 but don't have stock kdz
Click to expand...
Click to collapse
http://lg-phone-firmware.com/mobile/index.php?id_mod=62
Sent from my LG-D838

ubabic said:
http://lg-phone-firmware.com/mobile/index.php?id_mod=62
Sent from my LG-D838
Click to expand...
Click to collapse
you sure about the link?
http://csmgdl.lgmobile.com has gone long time ago..

ubabic said:
http://lg-phone-firmware.com/mobile/index.php?id_mod=62
Sent from my LG-D838
Click to expand...
Click to collapse
this site has only v20b (lollipop)
not the kitkat kdz

asar-bhai said:
this site has only v20b (lollipop)
not the kitkat kdz
Click to expand...
Click to collapse
What is your phone model F350 or D838?
If you don't find it here then search little bit on other sites on the internet...
Sent from my LG-D838

f350.....
i have searched everywhere but nothing

Same here
I have the F350S running LP (wish I had stayed with KK as now cant do very much else!)
Have never found the 10b KDZ file anywhere so cant downgrade?