Develop Bugs

[How-To][Tutorial] Downgrade Kit Kat 4.4.2 to JB 4.1.2

Hi,
I am just writing these steps to help those who want to downgrade from KK to JB due to any reason. Please use these steps at your own risk.
Some Background:
Recently I updated my Razr M to KK, it was Locked and Unrooted, but with the help of Twelroot and Motopocalypse I rooted and unlocked the BL.
Now somehow I didn't like the KK and wanted to go back to JB 4.1.2 because I was now having unlocked BL and rooted phone so it was easy but need to follow some steps to successfully downgrade to JB. So an unlocked BL and rooted with KK is must.
Prerequisite:
USB drivers for Razr M must be installed before proceeding.
Steps:
1. download the firmware file [Android 4.1.2
Blur_Version.98.30.1.XT907.Verizon.en.US] from http://sbf.droid-developers.org/phone.php?device=8
2. extract the above archive and replace the XML file with the one in attachment.
3. put the phone into fastboot mode and flash the firmware with RSD Lite (attached)
4. reboot and now you have JB 4.1.2
If you want to install root application again and also want to flash custom recovery then please follow the Post#5 [ATTACK] (thanks ATTACK)
Note : for custom recovery you will need the fastboot.exe if you don't have it then install minimal_adb_fastboot_v1.1.3_setup.exe(attached).
Put the phone in fastboot mode, copy the recovery to c:\ and execute the below command :
fastboot flash recovery [Path to recovery image]
If it help you then don't forget to press Thanks button !

Forgive my ignorance but this won't downgrade the kernel will it? I'm hoping it's possible to go from the newest OTA to the stable CM11 but I'm guessing this is new kernel JB. Either way thanks if I can't go to stable CM11 I'll stick with rooted 4.1.2.

Once you have a unlocked bootloader, you do not need to use "root programs". All you need to do is flash a custom recovery via Mfastboot / fastboot then flash SuperSU / Superuser.
In dhacker29's folder there are 2 different recoveries.
"msm8960" is for 4.1.2
"KITKAT" is for 4.4.2

ATTACK said:
Once you have a unlocked bootloader, you do not need to use "root programs". All you need to do is flash a custom recovery via Mfastboot / fastboot then flash SuperSU / Superuser.
In dhacker29's folder there are 2 different recoveries.
"msm8960" is for 4.1.2
"KITKAT" is for 4.4.2
Click to expand...
Click to collapse
thanks ATTACK, can you please point out that which recovery is specially for 4.1.2 because there are a lot of recoveries with msm8960 in Dhacker29's folder.
One more thing if you have flashable Su and busybox zip then please attach it , i will update the OP.
thanks alot.

DHACKER29's FOLDER
- LINK
JELLYBEAN 4.1.2 RECOVERIES
- CWM-6.0.4.6-swipe-moto_msm8960
- TWRP-2.7.0.0-moto_msm8960-hdpi
KITKAT 4.4.2 RECOVERIES
- CWM6049-RAZR-HD_M-KITKAT
- TWRP2710-RAZR_M-KITKAT
SUPERUSER - I'm just going to link to Chainfire's thread, Direct people to download from there.
http://forum.xda-developers.com/showthread.php?t=1538053
BUSYBOX
https://play.google.com/store/apps/details?id=me.timos.busyboxonrails

Could you go back to KK when you've downgraded to JB? Just asking this question early before the CM11 M8 release and the transition occurs.

TheForceUnleashed said:
Could you go back to KK when you've downgraded to JB? Just asking this question early before the CM11 M8 release and the transition occurs.
Click to expand...
Click to collapse
Yes.

ATTACK said:
Yes.
Click to expand...
Click to collapse
So just by flashing the KK firmware in RSD without any changes to the xml? Sorry for the noob questions, I realize how easy this phone can be bricked and I want to avoid it.

TheForceUnleashed said:
So just by flashing the KK firmware in RSD without any changes to the xml? Sorry for the noob questions, I realize how easy this phone can be bricked and I want to avoid it.
Click to expand...
Click to collapse
I see don't why you would need to. It would be just like restoring stock firmware via RSD Lite.

When I try to flash this, I get Failure on 2/20, sbl1

jrk190 said:
When I try to flash this, I get Failure on 2/20, sbl1
Click to expand...
Click to collapse
Did you replace the XML file included in attachment?
Sent from my ME173X using Tapatalk

Sure did. I can't even restore to 4.4.2, I'm stuck on a broken system with no wifi or signal. This sucks...

reply
is this sure it works? i read the feedback so,me user try it failed?

jrk190 said:
Sure did. I can't even restore to 4.4.2, I'm stuck on a broken system with no wifi or signal. This sucks...
Click to expand...
Click to collapse
Can you please post the error that is displayed in RSD Lite ?
The steps are tested by my 2 times, and there shouldn't be any problem. Make sure you have installed the correct drivers.
Please ensure that your bootloader is unlocked and shows BL unlocked status code 3 on BL screen.

I was also able to successfully flash back to JB with House of Moto via fast boot and full data wipe. It would not work with Universal or Keep Data, had to do full data wipe. Just another alternative :good:

xKroniK13x said:
I was also able to successfully flash back to JB with House of Moto via fast boot and full data wipe. It would not work with Universal or Keep Data, had to do full data wipe. Just another alternative :good:
Click to expand...
Click to collapse
I have used my method two time successfully, just follow the steps described in OP.

reply
Thanks You Its a Success Downgrade From 4.4 stock > CM11 > Stock rom 4.1 Thank you so much !!!

For those undergoing the downgrade process in RSD Lite and it takes forever for it to finish and the system ends up without data/signal, you need to RSD Lite flash again in order to regain signal. I believe the flashing was sluggish due to the jump from 4.4.2 to 4.1.2 and the many changes that were reflashed.
Sent from my DROID RAZR M using XDA Free mobile app

We have a wiener!
Thank you so much for the guide. After a lot of trial and error (mostly error), I thought that I had bricked my lovely XT907. I finally restored KitKat by flashing the 4.4.2 firmware with the edited XML file (deleting lines with "Getvar", "var" and "oem" in them), then followed your guide to the letter and found myself with a perfectly functional phone once again. No more sticky fastboot loops or audio-related crashes for me!
Lovely guide - thanks again! :laugh:
---------- Post added at 11:05 PM ---------- Previous post was at 10:59 PM ----------
What functionality does Busybox add? The description on the Play page is woefully sparse.
Thanks!

ATTACK said:
I *DON'T see why you would need to. It would be just like restoring stock firmware via RSD Lite.
Click to expand...
Click to collapse
*EDIT
I don't know why this posted as a new reply

[Q] NEED SUPPORT on Bootloop Problem after Flashing Custom Rom

Hi, I made a mistake flashing gomdolight wave on my lg g pro f240k stock rom. I was on Kitkat stock rom and flashed gomdolight which i believe is intended for JB only. After flashing, my phone got stuck on bootloop. I tried to download and flash another version of gomdolight which is intended for Kitkat but still, bootlooped again. What should I do? Can I flash other custom roms instead? Thanks in advance for those who would help.

josephangeles16 said:
Hi, I made a mistake flashing gomdolight wave on my lg g pro f240k stock rom. I was on Kitkat stock rom and flashed gomdolight which i believe is intended for JB only. After flashing, my phone got stuck on bootloop. I tried to download and flash another version of gomdolight which is intended for Kitkat but still, bootlooped again. What should I do? Can I flash other custom roms instead? Thanks in advance for those who would help.
Click to expand...
Click to collapse
you could try going back to stock using lg flashtool, that is sure to work.

josephangeles16 said:
Hi, I made a mistake flashing gomdolight wave on my lg g pro f240k stock rom. I was on Kitkat stock rom and flashed gomdolight which i believe is intended for JB only. After flashing, my phone got stuck on bootloop. I tried to download and flash another version of gomdolight which is intended for Kitkat but still, bootlooped again. What should I do? Can I flash other custom roms instead? Thanks in advance for those who would help.
Click to expand...
Click to collapse
First go in your recovery (if you did not install one download and install)
wipe / data
wipe / cache
wipe / davilk
wipe / system
ok, download a custom stock rom and place on your SD, this can be here
(make sure it's rom works on your device, it is 32gb or 16gb, if not this rom, look for one that is installed by the recovery)
http://forum.xda-developers.com/showthread.php?t=2419802
put it in the right place (follow the tutorial that is in the link)
Note: you will not install it by zip, will make a recovery.
Now that you have solved the problem of bootloop ..
You must return your original rom, for that you'll have to use the FashTools
Here in this link has step by step.
http://forum.xda-developers.com/showthread.php?t=2432476
Follow the tutorial about it that you'll be fine
If I helped you click Thanks = D

luisoman2000 said:
you could try going back to stock using lg flashtool, that is sure to work.
Click to expand...
Click to collapse
Is It the one where you use the TOT file or the one that you flash using kdz?

StyloKamikaze said:
First go in your recovery (if you did not install one download and install)
wipe / data
wipe / cache
wipe / davilk
wipe / system
ok, download a custom stock rom and place on your SD, this can be here
(make sure it's rom works on your device, it is 32gb or 16gb, if not this rom, look for one that is installed by the recovery)
http://forum.xda-developers.com/showthread.php?t=2419802
put it in the right place (follow the tutorial that is in the link)
Note: you will not install it by zip, will make a recovery.
Now that you have solved the problem of bootloop ..
You must return your original rom, for that you'll have to use the FashTools
Here in this link has step by step.
http://forum.xda-developers.com/showthread.php?t=2432476
Follow the tutorial about it that you'll be fine
If I helped you click Thanks = D
Click to expand...
Click to collapse
Hi, thanks for the tip. However, I checked the link you gave me. It's for E988 or 85. Will it work for me? Im using F240K.

josephangeles16 said:
Is It the one where you use the TOT file or the one that you flash using kdz?
Click to expand...
Click to collapse
Sorry, TOT is for E980, you need to use KDZ for your model. Tehre is a thread in the forum with all the kdz and tot files for the g pro.

josephangeles16 said:
Hi, thanks for the tip. However, I checked the link you gave me. It's for E988 or 85. Will it work for me? Im using F240K.
Click to expand...
Click to collapse
I Have LG E989 (brazil) and this rom work in my phone...
after all... all roms is compatible... but... the modem is other...
Use this rom... u need recovery any stock. After you stay in stock is possible u use KDZ files.. (FlashingTools)

I solved it!
Thanks to everyone who replied! I already solved it.
What I did, was flash a stock e980 version via KDZ Flasher, then I re-flashed back to my stock f240k. It worked, all signals were back.
I'm now proceeding on upgrading to Kitkat. Thanks again.

[Q&A] [STOCK] H815 10C STOCK ROM + KDZ [system + boot + modem + bootloader]

Q&A for [STOCK] H815 10C STOCK ROM + KDZ [system + boot + modem + bootloader]
Some developers prefer that questions remain separate from their main development thread to help keep things organized. Placing your question within this thread will increase its chances of being answered by a member of the community or by the developer.
Before posting, please use the forum search and read through the discussion thread for [STOCK] H815 10C STOCK ROM + KDZ [system + boot + modem + bootloader]. If you can't find an answer, post it here, being sure to give as much information as possible (firmware version, steps to reproduce, logcat if available) so that you can get help.
Thanks for understanding and for helping to keep XDA neat and tidy!

Question about clean install H815 10C STOCK ROM + KDZ
For very clean install can i wipe "dalvik, system, data, internal storage, cache" ? Except external sd where installation files are.
After that, should i install system boot, modem, system and in which order ?
Regards,
Florent

Florent35 said:
After that, should i install system boot, modem, system and in which order ?
Click to expand...
Click to collapse
You only need to flash the very large rom zip file and that's it :good:

Thanks.
That works but i have a little problem.
After installation, it is impossible for me to setup phone with gsm network. I can do it only with wifi...
Is it the same for you ? Any solution ?

The file factory.img in Codefire directory is the original stock recovery or the file recovery.img should be used to restore the stock recovery?

Germany (Europe Common)
Hi all!
My phone as it came clear is a LG-H815 but when I am unlocking lg says it is "Germany (Europe common), and it can't be unlocked... So it stops working, and wont go further...
My question is that: can I root it without the unlocking procedure, because I need that root soooo bad.
And if can root it, what is the procedure?
Thank you all for your kind answers!

Pfeffernuss said:
You only need to flash the very large rom zip file and that's it :good:
Click to expand...
Click to collapse
Hi, I got some Problems with a clean flash. After wipe everything I flash only the large file zip (1.4GB), but after flash, TWRP show there is no OS installed. Don't know why. When I flash Zip File dirty over 10A it works. Strange!
Have everyone the same Problem?

Awesome thank you. I was getting bothered with the whole "update" message that kept popping up on my phone.
Just a noob question though. Do I have to reset my phone in order to update or can I just update the system and keep all my data in it (I know I will lose root though but that's easy to fix)?

reset all?
i did install this rom. i installed lot of crap (apk) i want a reset xD
what should i do to make a "full new installation" in 10C with this very ROM?
what happens if i wipe the "system" in reovery mode?
thx (im not english)

Will i be able to change my software version from 10b-HKG-xx to a EUR one doing this?

Delete

Has anyone else tried installing the camera mod on this ROM (http://forum.xda-developers.com/g4/development/stock-h815-10c-stock-rom-kdz-t3141866)? I'm don't see the new options that I should see after flashing. I've also tried installing manually without success.

fine
merci !

I guess no one except Autoprime can help us with new updates, but since his phone is broken there is no big chances for project development. Maybe we can altogether collect some amount for him to buy a new phone?

Hey i'm getting my LG G4 H815 today
Question
1 - What's the purpose of flashing this rom if it's just stock or did I miss something here?
2- What's KDZ?
3- I'll be using T-Mobile, do I need to flash a specific modem or will being on stock radio be fine?
I"m coming from a OPO & N6, so I'm trying to test this phone to see if I will like it.
Thanks

Is there a chance to get TWRP-flashable stock rom H815 10D. Or how to make it itself? Don't want to loose cutom recovery and all other goodies and recover all of them from the scratch

nixuspix said:
Is there a chance to get TWRP-flashable stock rom H815 10D. Or how to make it itself? Don't want to loose cutom recovery and all other goodies and recover all of them from the scratch
Click to expand...
Click to collapse
Using the LG Flash Tool to flash the KDZ in "Normal Flash" mode, rather than "CSE Flash" mode will install the stock Rom and remove TWRP and root.
Your apps and data remain on the phone.
Once installed, simply re-flash TWRP using the instructions in the thread below
http://forum.xda-developers.com/g4/general/howto-unlock-twrp-root-1-thread-t3130538
... and then re-flash supersu via TWRP and you're done.
The whole process takes less than 10 minutes.
:good:

pcoulson said:
Using the LG Flash Tool to flash the KDZ in "Normal Flash" mode, rather than "CSE Flash" mode will install the stock Rom and remove TWRP and root.
Your apps and data remain on the phone.
Once installed, simply re-flash TWRP using the instructions in the thread below
http://forum.xda-developers.com/g4/general/howto-unlock-twrp-root-1-thread-t3130538
... and then re-flash supersu via TWRP and you're done.
The whole process takes less than 10 minutes.
:good:
Click to expand...
Click to collapse
One more question please: i have some LG and Google bloatware and LG Update.app disabled ATM. Should i enable them all before starting or this doesn't matter?
Thank You

nixuspix said:
One more question please: i have some LG and Google bloatware and LG Update.app disabled ATM. Should i enable them all before starting or this doesn't matter?
Thank You
Click to expand...
Click to collapse
Re-enabling before the flash wouldn't hurt - I would go ahead and re-enable.

Lg flash tool crashes with windows 10!

[BOOTLOADER] Bootloader Unlocker/Locker from recovery

Hi guys
Bootloader unlockers/lockers from recovery are here.
Easy method to unlock & relock Optimus G bootloader.​
Good things about these zips:
1. No running OS is needed.
2. You don't have to be on lg stock roms.
3. Work much faster & easier. Less than a minute.
4. You will still have custom recovery after locking your bl.
How to use?
Using bumped recovery, flash them like other zips in recovery.
Don't have recovery?
Flash a bumped recovery img (inside of the attached zips) with an app like Flashify or Kernel Adiutor or etc.
Note: BL unlockers flash unlocked bootloader + Philz/CWM recovery. Booting up on unlocked BL needs unlocked kernel.
So in stock roms, don't forget to flash an unlocked kernel, like unlocked stock kernel or solid kernel or etc...
Anyway in case of any problem, there is no worry because you can always access to Philz touch(for E975) or CWM(for other variants) recovery.
I could only test E975 ones. Other variants unlockers must also work. But you are the testers...
Mirror links (files folder):
https://mega.nz/#F!4JwWCJZB!3jFrgKSdRhAhdwLadD_YaQ

Please Note:
1. I'm waiting for your feedbacks. Please give feedback with name of your variants.
2. I didn't have stock bootloader files for other variants, so I could make bootloader locker for E975 only.
Some guides:
1. How to flash boot/recovery .img in Kernel Auditor?
In the Backup section of the app, use Flash IMG button, then select your .img file (extract them from zips), then select the partition to flash (boot/recovery).
2. You can use your own bumped recovery img, using the bump tool
3. On locked bootloader you can enter to recovery with hardreset method.
4. After flashing Makoz30f Flasher (not after unlocking, unlocking is ok), it will also flash bootloader tz.img & rpm.img.
Flashing Mako rpm.img will cause false heat issue on LG roms so your screen brightness will not go further than 63%(& cpu clock speed further than 1188000). E975 unlocker & relocker zips will replace tz & rpm partitions with stock ones. So you can use them to fix this problem.

Whats mean stockboot?
Btw thanks, no instal freegee to unlock bl , nice job

christboanerges said:
Whats mean stockboot?
Btw thanks, no instal freegee to unlock bl , nice job
Click to expand...
Click to collapse
for other variants of og, after unlocking, you need to flash an unlocked kernel, but for E975, if you use the zip that has stockboot, you dont need to do anything & it flashes the kernel for you.

What's it use for ?

paul_zm said:
What's it use for ?
Click to expand...
Click to collapse
For someone who want to lock or unlock bootloader without use anyapp. Btw thanks author.

tiennhu89 said:
For someone who want to lock or unlock bootloader without use anyapp. Btw thanks author.
Click to expand...
Click to collapse
Thank you guys.
Since Gee3 rom has better speed & LTE support in our stock roms, I'm making Gee3 v1.3 & I'm testing it, but with this kind of statistics , it seems there's no motivation no replays about its working on other variants...

M.M.K said:
Thank you guys, but you may press thanks if you really like it
Since Gee3 rom has better speed & LTE support in our stock roms, I'm making Gee3 v1.3 & I'm testing it, but with this kind of statistics , there's no motivation no replays about its working on other variants...
Click to expand...
Click to collapse
waiting for this great update, and I encourage that there are still people waiting to see more of our og thank you
Google translator

MMK instruction
Hi MMK,
I'm a total newbie and it's the first time i've ever flashed a device, my E975 is completely stock (but i've root privilege and su is installed). I've installed flashify and downloaded a zip (i don't have a special kernel at the moment do you suggest stockboot). Now i've unzipped the folder on the phone but i'm uncertain about what to do now, there are a lot of images and i really don't know where to flash what. Can you suggest a more detailed procedure?
Thank you for the effort and thanks in advance.

great job bro ^_^

akula.ee said:
Hi MMK,
I'm a total newbie and it's the first time i've ever flashed a device, my E975 is completely stock (but i've root privilege and su is installed). I've installed flashify and downloaded a zip (i don't have a special kernel at the moment do you suggest stockboot). Now i've unzipped the folder on the phone but i'm uncertain about what to do now, there are a lot of images and i really don't know where to flash what. Can you suggest a more detailed procedure?
Thank you for the effort and thanks in advance.
Click to expand...
Click to collapse
Hi, If your bootloader isn't already unlocked:
In flashify you must choose recovery image from flash section, then choose the Philz.recovery.img you've extracted.
Then press reboot to recovery from options & simply flash the zips in recovery mode to lock or unlock your bootloader.
Make sure to use your own variant zip.

Hi MMK . i wang to offline charging on sling rom . how i have to do .
my device e970 . TWRP 2.8.5 .I'm using sling kahroba right now.

Chum.zuizui said:
Hi MMK . i wang to offline charging on sling rom . how i have to do .
my device e970 . TWRP 2.8.5 .I'm using sling kahroba right now.
Click to expand...
Click to collapse
If you want stock based roms like Sling Kahroba,
Before unlocking, flash a bumped recovery & install the bumped Sling Kahroba... Easy.
PS: you can't use lockers because they're only for E975 variant.

M.M.K said:
Hi guys
Bootloader unlockers/lockers from recovery are here.
Easy method to unlock & relock Optimus G bootloader.​
Good things about these zips:
1. No running OS is needed.
2. You don't have to be on lg stock roms.
3. Works much faster & easier. Less than a minute.
4. You will still have custom recovery after locking your bl.
How to use?
Using bumped recovery, flash them like other zips in recovery.
Don't have recovery?
Flash a bumped recovery img (inside attached zips) with an app like Flashify or Kernel Adiutor or etc.
Note: These zips flash bootloader + Philz/CWM recovery.
So in stock roms, don't forget to flash an unlocked kernel, like unlocked stock kernel or solid kernel or etc.
In case of any problem, there is no worry because you always access to Philz touch(for E975) or CWM(for other variants) recovery.
If you provide me other variants stock bootloader files, I can make bootloader lockers for them too.
I could only test E975 ones. Other variants unlockers must also work. But you are the testers...
Mirror links (files folder):
https://mega.nz/#F!4JwWCJZB!3jFrgKSdRhAhdwLadD_YaQ
Click to expand...
Click to collapse
Worked perfectly on my E975. Used bootloader locker+stockboot. Well done.

ppswaroopa said:
Worked perfectly on my E975. Used bootloader locker+stockboot. Well done.
Click to expand...
Click to collapse
Made for convenience
Thanks for the result.

Worked flawless in my E977 :good:

I need to unlock my bootloader. I used to do it with freegee but it doesnt work no more. Can i do it with this method? if so let me know guyz
Im on stock rom with locked bootloader BTW

HeXoR007 said:
I need to unlock my bootloader. I used to do it with freegee but it doesnt work no more. Can i do it with this method? if so let me know guyz
Im on stock rom with locked bootloader BTW
Click to expand...
Click to collapse
Check your variant & go for it...
I've described what you should do on stock rom & locked bl.
Start with Flashify & follow the procedure.
Mr.MEX bootloader unlocker also works...

New bootloader Z30F (boot-z30f.zip):
https://yadi.sk/d/GqqvKSddenX5R/MAKO BOOT MOD TESTED/LG Optimus G
Go to recovery, flash zip, enjoy!

Mr.MEX said:
New bootloader Z30F (boot-z30f.zip):
https://yadi.sk/d/GqqvKSddenX5R/MAKO BOOT MOD TESTED/LG Optimus G
Go to recovery, flash zip, enjoy!
Click to expand...
Click to collapse
whats the difference with the z30f from here? http://forum.xda-developers.com/nexus-4/general/nexus-4-bootloader-collection-t2105983

ROOT/Downgrade Soft/QUESTIONS

I have a few questions
1.Actually thers no way to Root Android 6.0 on locked bootloader ? Or Unofficial Unlock bootloader method ?
2.When things in point 1 are impossible I Want to back to Android 5.0 , I have LG-h815 Android: 6.0 V20d-EUR-XX International
I want flash 5.0 via lg flashtool but I dont know what android 5.0 kdz I must choose and Can I chose any kdz ? Can i flash example poland 5.0 kdz ? (sorry for bad English)

If you've got the h815 international version then why don't you unlock your bootloader via lg devs and flash twrp then use SuperXEs kernel with auto-root , that will give you root access on marshmallow or you can unlock your bootloader and flash the 5.0 lollipop .kdz file , just be careful and make sure you follow all the steps correctly in each thread...
---------- Post added at 01:25 AM ---------- Previous post was at 01:23 AM ----------
Xceeder said:
If you've got the h815 international version then why don't you unlock your bootloader via lg devs and flash twrp then use SuperXEs kernel with auto-root , that will give you root access on marshmallow or you can unlock your bootloader and flash the 5.0 lollipop .kdz file , just be careful and make sure you follow all the steps correctly in each thread...
Click to expand...
Click to collapse
And p.s NO you cannot flash a different .kdz file , if your phone is international then you must flash international files or you will brick your phone...

I know that I can do what you have written but i do not want to lose my warranty

If i have V20d-EUR-XX International , what Kdz I must flash to have 5.0 ?

Thank you for the advice! Please, could you provide links for the soft and forum's posts mentioned?
Thanks again!

What do you mean ? I dont know what kdz choose : 10, 20 , a , b , d ?? Which one to get lolipop on international ?

Please help me , bcs i dont know what i must flash , i dont want lose warranty and brick phone ;<

UP

up

up ;0