I will try to make my question as simple as i can.
I bought a used LG Optimus G F-180 yesterday. Its rooted with a custom ROM installed (i checked through many apps from play store, they all showed that it has root access). So my question is "How do i unroot it and revert back to the original software/firmware/ROM? And after reverting how do i update it to stock 4.4.2 KitKat?"
Please provide step by step instructions and links as im new to this rooting/unrooting.
Cheers!
Little guide
Zohaibzx said:
I will try to make my question as simple as i can.
I bought a used LG Optimus G F-180 yesterday. Its rooted with a custom ROM installed (i checked through many apps from play store, they all showed that it has root access). So my question is "How do i unroot it and revert back to the original software/firmware/ROM? And after reverting how do i update it to stock 4.4.2 KitKat?"
Please provide step by step instructions and links as im new to this rooting/unrooting.
Cheers!
Click to expand...
Click to collapse
There are a lot of threads about flashing new ROM. Dont make in future more similar threads.
USE SEARCH BEFORE POSTING.
Hi,
IM NOT RESPONSIBLE FOR ANY DAMAGE OR UNSUCCESFULL FLASH. EVERY PHONE IS DIFFERENT. EVEN EVERY LG OPTIMUS G IS DIFFERENT, in its way.. YOU BRICK=YOU FIX.
YOU CAN FOLLOW THIS GUIDE TOO. http://forum.xda-developers.com/showthread.php?t=2498102
But LG flash tool 2014 is simplier.
First make sure you have:
Fully charged phone,
Know how to enter download mode (turn off phone > hold volume buttons > connect to pc)
Turned off debugging mode
IF SOMETHING GO WRONG AND YOU WANT GO BACK FROM DOWNLOAD MODE, HOLD POWER BUTTON FOR ABOUT 10 Seconds, than release it and phone will restart. But disconnect from pc first...
DOWNLOADED:
LG flash tool - http://forum.xda-developers.com/showthread.php?t=2797190
Drivers.
KDZ FOR YOUR LG VARIANT.
Download LATEST LG Mobile Support Tool
All your data will be removed.
0. Unpack zip with flash tool somewhere to NEW folder. Name it what you like.
1. Enter download mode
2. In the LG Flash tool choose 3GQCT or CDMA it depends on what u have.. I guess 3GQCT
And choose CS_EMERGENCY (always when coming back from custom ROM)
And choose KDZ with your Original system, which HAS TO be placed in LG FLASH TOOL folder.
3. Click Normal Flash > Start > choose region (korea) and language (what u want)
4. Now the process will begin.
5. After finish flash, your phone can bootloop. Than you have to make reset to clean it up.
6. Done, you have clean system and everything.
Tip for future.
!!Dont change radio in LG, you can mess it up...!!
Thanks to:
@davevinci
@quangnhut123
And my friend @hpesojames
If something is not good, pm me.
Hi all,
Long time user first time posting a thread [sorry couldn't help myself]
Anyway I have a LG G3 F400L and I accidentally installed D855 rom on to it [AndroidNow_HD_8.0_Lollipop].
I have tried flash tool to flash the correct firmware but to no effect it now detects it as D855, so I cant install the F400L firmware using the F400L dll. I am installing an older firmware i.s 10e I have also tried 20f for F400L but the new flash tool doesn't recognize my phone, I have tried different USB ports and a different PC with Windows 7 32bit still nothing.
I am using Windows 8.1 64bit.
Regards and thank you for the help.
Anyone, please help.
Use cwm or any other recovery backup to restore
akashvermaofskt said:
Use cwm or any other recovery backup to restore
Click to expand...
Click to collapse
Thank you for the response. I do not have access to recovery, only download mode works.
Update: I have tried using a general Dll to flash TOT file via flashtool but it doesn't let me error CrossDl [D855] to [F400L].
I had this and I set for 4 hours figuring out how to fix it. ( I had not accsess to the download mode first only to hard reset which didn't work and the "Fastboot mode started")
If you have access to the Download mode that's perfect, Follow this Tut:http://lgg3root.com/lg-g3-root/how-to-unrootunbrick-lg-g3/
Please make sure you download the correct TOT file for your phone.
http://downloadandroidfiles.org/Files/LG G3/Stock Files/
SaharLevi said:
I had this and I set for 4 hours figuring out how to fix it. ( I had not accsess to the download mode first only to hard reset which didn't work and the "Fastboot mode started")
If you have access to the Download mode that's perfect, Follow this Tut:
Please make sure you download the correct TOT file for your phone.
Click to expand...
Click to collapse
Thank you that did work sort of, I was doing the same thing but someone in the comments referred to a modded DLL for the flash which did the job to some extent at least.
Its back to stock but stuck at McAfee activation, requires a pin which I do not have nor have ever created one, and now a Kill switch has been engaged and no more download mode. Out of the fire into the frying pan is what I feel like right now 100hours and 33mins without my G3, but who is counting.
That's sucks where did the McAfee activation came from??
Have you tried a hard reset ? or can you access the fastboot mode again ?
SaharLevi said:
That's sucks where did the McAfee activation came from??
Have you tried a hard reset ? or can you access the fastboot mode again ?
Click to expand...
Click to collapse
Nothing, no download mode or recovery. Boots up asks for language selection and then McAfee pops up of PIN. I am talking to McAfee support hopefully they can help.
Goodluck with that!
Thank you all.
Finally fixed. Just needed to be quick, the McAfee app gives you about 30 secs to do your thing then it pops up for pin. I opened up the McAfee app -> setting and changed the pin .
First of all I want to Thank cybertag (a member at reddit.com) whose help made me find this solution. And sorry if my English is not good, it is not my first language. As I don't have enough posts here, XDA restricts me to post external links so this is the best I could do. I will add links to the files needed once i am allowed.
A few days ago I was tinkering with after my lg g2 ls-980, the sprint version of lg g2, rooted but no custom recovery installed and I made my first mistake of changing the model number from ls-980 to D802 in built.prop file thinking that it will only change the model number shown in the hardware information and restarted the phone. Once my phone booted up after that restart everything was crashing. There was a huge number of crash reports popping on the screen and I was not able to use anything. So I downloaded the .tot files of the stock firmwares LS980ZVC and LS980ZVE (don't know why but I downloaded both) along with the .dll file needed to flash the firmware for ls980 and when I tried to flash the firmware booting the phone in download mode and using the LG Flash tool but it gave me an error saying that the firmware does not match with model number of my phone. Both firmwares gave the same error. My phone and the flash tool both were thinking it was D802 while it was not.
Now i made my second mistake and downloaded the stock firmware for D802 and flashed it using LG flash tool. The firmware was flashed successfully without any error, but when the phone booted up after the flash the touch screen was behaving funny and phone restarted every 15-20 seconds because this firmware was not meant to be used with LS-980. I was unable to do anything the way touch screen was behaving.
I spent most of my time for the next few days googling for the solution and searching on XDA and also on reddit. I found multiple threads reporting that a generic no-check DLL file is the savior in this situation, but when I tried to run it I get continuous errors telling me the following: "CrossDL [D8012] to [LS-980]". Then i found this thread by cybertag on reddit which lead me to the right direction. It suggested to hex edit the .tot file for ls-980 so that the flash tool thinks that it is for D802. So I grabbed a hex editor and found the first mention of LS-980 and changed it to D802, saved the file and tried o flash it but it was still giving different errors. Then someone suggested it only works if you edit the .tot firmware in linux based OS. So i installed ubuntu OS on a virtual machine and tried editing the firmware in that OS using Bless Hex editor, still no success in flashing. Then I tried editing in pinguy OS but in vain. Then I found FlexHex for windows and used it for editing the LS980ZVC.tot firmware did the same thing, found the first mention of LS-980 and changed it to D802, saved the file, flashed it and bingo! the flash tool gave no error this time and flashed the phone successfully.
Now there was another problem. When the phone rebooted after flashing the firmware it got stuck on LG logo forever. And when I tried to boot it into download mode, the download mode was gone and it took me to fastboot mode. The phone was stuck in bootloop and there was no download mode anymore. Now after more searching i found a method to resolve this problem. Downloaded the aboot.img and laf.img partitons for LS980ZVC and flashed both using fastboot commands. Tried to boot into the download mode again and it worked and i was in download mode one again. When I checked the phone model was changed back to LS-980, the original one. Flashed the LS980ZVE firmware from original .tot file as it was the latest version available to date and it flashed without any error. When the phone rebooted after completing the flashing process, it was as good as new, up and running the original stock kitkat rom for this model. Tested and tried everything and never noticed any issue.
Thank you @tauheed that will help a lot of people I'm sure.
Thank reddit member cybertag out there to.
please help
Hi sir!
i think i got just the problems with yours, but i not sure how to get my phone into fastboot mode no matter how many i press the [power+volume up] it just start up and stay at lg logo screen forever.
Can you explain how to get my LS980 into fastboot mode step by step, if i can put it in fastboot mode, i think i can fix it. please help
secret.animal said:
Thank you @tauheed that will help a lot of people I'm sure.
Thank reddit member cybertag out there to.
Click to expand...
Click to collapse
First of all, i'm sorry for my bad english.
i having the same problems as him. my LS980 is stuck at LG logo screen (not rebooting) it just stay there forever!
when i tried to boot it into download mode, at first i thought gonna successfully boot into download mode, but it DID NOT.
Please refer to my picture below to get better understanding what i'm trying to explain and again i'm sorry for my bad english.
My pc can detect my LS980 but not in fastboot mode, i mean if i try to boot into download mode then my pc won't detect it.
I really NEED some videos if possible of how to fix this, a million thanks!!!
[email protected] said:
Hi sir!
i think i got just the problems with yours, but i not sure how to get my phone into fastboot mode no matter how many i press the [power+volume up] it just start up and stay at lg logo screen forever.
Can you explain how to get my LS980 into fastboot mode step by step, if i can put it in fastboot mode, i think i can fix it. please help
Click to expand...
Click to collapse
what happens when you try to boot in to download mode?
it it stuck at download mode or something else happens?
Looks to be stuck with a broken download mode. His laf partition is broken.
tauheed90 said:
what happens when you try to boot in to download mode?
it it stuck at download mode or something else happens?
Click to expand...
Click to collapse
its just stuck like the picture that i attached below . it won't go any future.
Can you help fix this?
or what can i do to fix it?
i got a LG G2 LS980
secret.animal said:
Looks to be stuck with a broken download mode. His laf partition is broken.
Click to expand...
Click to collapse
hi m8, do you know how can i fix this?
please i really need some HELP over here, thank for reply
I'm looking into seeing how we can replace that laf partition that is broken. So we can fix this.
secret.animal said:
I'm looking into seeing how we can replace that laf partition that is broken. So we can fix this.
Click to expand...
Click to collapse
it sound like i'm in big problem right?
i'm total noob with this, sorry.
[email protected] said:
it sound like i'm in big problem right?
i'm total noob with this, sorry.
Click to expand...
Click to collapse
No problem, this is how we learn. One from the broken side and one from the fixing side. It's all good.
[email protected] said:
it sound like i'm in big problem right?
i'm total noob with this, sorry.
Click to expand...
Click to collapse
the only possible option is to flash the aboot.img and laf.img partitions. But we need to find a way to do so in your phone's current state. Things can be a lot easier if you could manage to get into fastboot mode.
tauheed90 said:
the only possible option is to flash the aboot.img and laf.img partitions. But we need to find a way to do so in your phone's current state. Things can be a lot easier if you could manage to get into fastboot mode.
Click to expand...
Click to collapse
Please help me out! i already bricked it for nearly 1 month already T_T
helo sir i am on window 7 i dont know how to edit modal number from hex can you please post a screen shots, i will be thanful to you plz sir help me otherwise my best will be just a plastic piece
i have wrongly flash lg g2 ls980 to d802 because the phone was refurbished
now phone is reboot and imei and baseband is unknown
so i am trying ur method but what do i have to edit in the hex editor
in flastool imei is getting shown but flash fails
please reply need urgent help
secret.animal said:
No problem, this is how we learn. One from the broken side and one from the fixing side. It's all good.
Click to expand...
Click to collapse
dear sir, i have lg d802 or d800, i dont know exactly bcoz seller sold me as d802.when i flashed stock kdz of d802 , its touch screen start weired behaviour, sometime stop reposnding or some thime i touch some thing else but some thing else selected.to check i opened the back of phone, its touch strips were written with d800 /801 and 803. but d800 was marked.so i flashed d800 tot file.after flashing phone boot but in boot loop.i can enter stock recovery to hard reset, but after that still boot loop.i can access download mode, but pc do not detect phone in download mode.when i power on in normal way than device manager shows modem and lg android net. but in download mode no detection.
what can i do in this situation? do this short capacitor method will work for me? or what else i can do to get it to life again,
plz waiting for response . it is same like attached pic of download mode in starting page of this thread
afzalcool said:
i have wrongly flash lg g2 ls980 to d802 because the phone was refurbished
now phone is reboot and imei and baseband is unknown
so i am trying ur method but what do i have to edit in the hex editor
in flastool imei is getting shown but flash fails
please reply need urgent help
Click to expand...
Click to collapse
majid.ayub999 said:
helo sir i am on window 7 i dont know how to edit modal number from hex can you please post a screen shots, i will be thanful to you plz sir help me otherwise my best will be just a plastic piece
Click to expand...
Click to collapse
You have to edit the first mention of the model number in the hex editor. Don't mess with anything else.
i was able to sole the problem.
have you found any solution?
[email protected] said:
its just stuck like the picture that i attached below . it won't go any future.
Can you help fix this?
or what can i do to fix it?
i got a LG G2 LS980
Click to expand...
Click to collapse
Have you found any solution to this problem?
I am the same problem as yours with another phone I have. It is a D800 which was wrongly flashed to D802. After flashing the D800 firmware with the model name edited, it is stuck on LG logo and it won't go to download mode either.
Not yet. I'm still waiting...total dead phone now.
Need hep with my probably dead phone.
I got suddenly problem with my G4 model 818N, . Working perfectly for 3 months, on 6.0 Today because of travel had to change battery with new battery, working OK after battery change. Them suddenly during use just reboot.. Phone starts after that, show screen apps are upgrading and stuck on logo for some time. Get very hot and reboot again some cycle
I succeed to put it in download mode, LG UP see it but when i try to flash firmware, it say TOT type not correct. I just downloaded kdz file renamed it and added to LGUP. Is this correct way to add kdz? KDZ is correct for this phone.
Anyone idea how to check if phone is dead or can be recovered? I don't care about data on phone, just want to see if can bring it back to life. I can enter download mode, but can not enter reset scree? This is little strange ??
If u want to flash a kdz, first u select from LGUP the update option ,select kdz and after that u thick the refurbished option. Hope this works for you
Some pics of whats i`ve just said
Like a lot of people I have the eu version of the h815 and managed to bootloop it after following the garbage methods online for rooting .. I came here for help and found all the methods listed... lg up, lg flashtool 2014 etc.. the problem was that my phone just wasn't recognized by the computer, it charged well but that was it, lg bridge, lg up, lg flashtool.. none could find my phone.. I thought I was doomed to a soft bricked paperweight and even began contemplating the hundreds of pounds needed to purchase a new phone.. however after hours and hours of tinkering I cracked it and now have a working lg g4 again.
first off download and install lg up dll file
then install lg up but don't open yet
find and make sure u download the correct kdz firmware file ( I needed the h81520d file which I downloaded from storage cow as devtesters didn't work for me)
now head to your computer control panel and delete(uninstall) any lg mobile drivers that you see.
connect your phone through usb into download mode and leave connected
once that's done download the old drivers (4.0.4 I believe) and not the newest 4.1.1 or whatever it is now.
then open lg up and hopefully like me you see your recognized phone.
click upgrade (not refurbish) and click bin.. right of bin is the ... symbol.
hit that, choose your kdz file and voila.. let it work its magic..
DAMN IM HAPPY. HOPE THIS CAN HELP SOME OF YOU LIKE IT DID ME.