[Root & Bootloader Unlock] Docomo Optimus G

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chacho_2me

Senior Member
Aug 19, 2011
816
98
ASUS ROG Phone 3
Samsung Galaxy S22 Ultra
so looks like I am one of the first to confirm JCASE and his friends Rooting Procedure... ITS WORKING!!!!!

but please be informed that since I had problems installing fastboot on windows... i used my Fedora to be safe... but I believe once you are sure with your fastboot drivers..then you too will not have any problems

I know I may look redundant..but I want to share what I did so that some people can follow because I myself had some issues...

so here goes.

* my system was fedora 18 32bit

1. I searched for android on the fedora package manager
- Android Platform Tools (adb,fastboot)
2. Downloaded the files as per sir JCASE
3. on terminal, I followed this Commands

adb push lk.img /data/local/tmp/lk.img

adb push unlock.sh /data/local/tmp/unlock.sh

adb shell chmod 755 /data/local/tmp/unlock.sh

adb shell touch /sdcard/g_security

4. Was kinda nervous about Disabling and Re-enabling USB DEBUGGING,

so what I did is that I disconnected and reconnected my phone :)

5. verified if my device is still seen by adb via this command

adb devices

6. once verified, then do this command

adb shell id

7. and I smiled when I had the error

---not executing /system/bin/sh

8. next was this command

adb push hotplug /proc/sys/kernel/hotplug

9. Then I just Clicked the BLUETOOTH ICON in the STATUS BAR and then I did had the Screen Issue (and yup it is normal)

10. CHecked if my device is connected via fastboot by this command

fastboot devices

11. Once my Device was seen, i followed these commands

fastboot flash boot boot.img

fastboot reboot

12. after few seconds of reboot..I did this command


adb shell /sbin/rootme.sh

13. Then there was the note to install SuperSU

14. After installation, I had some issues with network..so i restarted 2x

15. And now I have Root, I just installed Cache Mate just to make sure and it worked


Sorry Sir Jcase for being redundant

anyway, this will not happen without the help of sir JCASW..so in behalf of all the L-01E Users, THANK YOU SO MUCH!!!!

maybe this week..i will treat you with some coffee or beer.. hahahaha.. CHEERS!!!


***PLEASE TAKE NOTE THE COMMANDS from sir JCASE.. maybe due to my excitement, maybe i had some mixed up with the commands..

again sir JCASE..thank you so much!!!
 
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Reactions: demonntl
Misudoll

Misudoll

Senior Member
May 17, 2012
142
23
Beijing
chacho_2me said:
so looks like I am one of the first to confirm JCASE and his friends Rooting Procedure... ITS WORKING!!!!!

but please be informed that since I had problems installing fastboot on windows... i used my Fedora to be safe... but I believe once you are sure with your fastboot drivers..then you too will not have any problems

I know I may look redundant..but I want to share what I did so that some people can follow because I myself had some issues...

so here goes.

* my system was fedora 18 32bit

1. I searched for android on the fedora package manager
- Android Platform Tools (adb,fastboot)
2. Downloaded the files as per sir JCASE
3. on terminal, I followed this Commands

adb push lk.img /data/local/tmp/lk.img

adb push unlock.sh /data/local/tmp/unlock.sh

adb shell chmod 755 /data/local/tmp/unlock.sh

adb shell touch /sdcard/g_security

4. Was kinda nervous about Disabling and Re-enabling USB DEBUGGING,

so what I did is that I disconnected and reconnected my phone :)

5. verified if my device is still seen by adb via this command

adb devices

6. once verified, then do this command

adb shell id

7. and I smiled when I had the error

---not executing /system/bin/sh

8. next was this command

adb push hotplug /proc/sys/kernel/hotplug

9. Then I just Clicked the BLUETOOTH ICON in the STATUS BAR and then I did had the Screen Issue (and yup it is normal)

10. CHecked if my device is connected via fastboot by this command

fastboot devices

11. Once my Device was seen, i followed these commands

fastboot flash boot boot.img

fastboot reboot

12. after few seconds of reboot..I did this command


adb shell /sbin/rootme.sh

13. Then there was the note to install SuperSU

14. After installation, I had some issues with network..so i restarted 2x

15. And now I have Root, I just installed Cache Mate just to make sure and it worked


Sorry Sir Jcase for being redundant

anyway, this will not happen without the help of sir JCASW..so in behalf of all the L-01E Users, THANK YOU SO MUCH!!!!

maybe this week..i will treat you with some coffee or beer.. hahahaha.. CHEERS!!!


***PLEASE TAKE NOTE THE COMMANDS from sir JCASE.. maybe due to my excitement, maybe i had some mixed up with the commands..

again sir JCASE..thank you so much!!!
Click to expand...
Click to collapse

so at this step just click the bluetooth button once and that will do
am I right dude ?
congratulations you finally get the device root :D

Sent from my LG-F160L using xda premium
 
jcase

jcase

Retired Forum Mod / Senior Recognized Developer
Feb 20, 2010
6,308
15,761
Raleigh NC
loogeo said:
finally 10 post......:cyclops:
I have a dev LG F160S...It like F180...This is the first LG phone with 2G RAM
and This is the first LG phone with 4.1 jb :)....This is a great phone:D。。。but LG lock the BL...Can you help me to unlock the bl?

I can provide the .tot
offical aboot,recovery,boot here

btw,You can experiment with my phone:fingers-crossed:
Click to expand...
Click to collapse

Contact me on freenode or gtalk (jcase@cunniglogic.com) to discuss this privately, do not attempt to use this method.
 
germes81m

germes81m

Senior Member
Oct 4, 2010
198
27
www.paybox.me
chacho_2me said:
ammmm... i dont know why i cant install the the fastboot drivers... i only installed the lg united drivers...and some drivers via windows update.... need help.. already tried uninstall the driver and restarted the PC..but everytime i rebooted back.. drivers is again there.eventhough i disconnected my internet... yeah i know im dumb...sorry
Click to expand...
Click to collapse

during root my device I already installed usb drivers on my pc(Win7 x64) but my device not found. Then mr jcase send me this naked driver and device found success.
Try with this driver
 
Misudoll

Misudoll

Senior Member
May 17, 2012
142
23
Beijing
Originally Posted by hobbit19<br />
hello.<br />
and who tried<br />
http://xdaforums.com/showthread.php?t=2099784?
Click to expand...
Click to collapse
<br />
<br />
Dangerous and off topic for my thread. Please inquire elsewhere.<br />
<br />
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse

my friends says this method also works on LGOG KR version @Android 4.1.2
you may ask some of your friends to check and post a new thread to help the KR version users
it's a dramatic news indeed as some of my friends were looking for rooting method on 4.1.2 so long and suddenly it appears :D:D:D

Sent from my LG-F160L using xda premium
 
jcase

jcase

Retired Forum Mod / Senior Recognized Developer
Feb 20, 2010
6,308
15,761
Raleigh NC
Misudoll said:
my friends says this method also works on LGOG KR version @Android 4.1.2
you may ask some of your friends to check and post a new thread to help the KR version users
it's a dramatic news indeed as some of my friends were looking for rooting method on 4.1.2 so long and suddenly it appears :D:D:D

Sent from my LG-F160L using xda premium
Click to expand...
Click to collapse

The backdoor provided by giantpune should work on all LG Optimus G, and most lg phones i believe
 
  • Like
Reactions: Misudoll
medo18

medo18

Senior Member
Jul 1, 2010
410
108
Saudia Arabia
My problem was


D:\LG Optimus G\Fastboot>adb push lk.img /data/local/tmp/lk.img
1264 KB/s (234640 bytes in 0.181s)

D:\LG Optimus G\Fastboot>
D:\LG Optimus G\Fastboot>adb push unlock.sh /data/local/tmp/unlock.sh
29 KB/s (224 bytes in 0.007s)

D:\LG Optimus G\Fastboot>
D:\LG Optimus G\Fastboot>adb shell chmod 755 /data/local/tmp/unlock.sh
- exec '/system/bin/sh' failed: Operation not permitted (1) -
check_LGE_official: enable_root = 0, size = 0

D:\LG Optimus G\Fastboot>
D:\LG Optimus G\Fastboot>adb shell touch /sdcard/g_security
- exec '/system/bin/sh' failed: Operation not permitted (1) -
check_LGE_official: enable_root = 0, size = 0

any solutions?
 
Last edited:
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  • 14
    jcase
    jcase
    Original source: http://www.androidpolice.com/2013/01/21/exclusive-how-to-root-ntt-docomos-lg-optimus-g/

    Credits:
    adb backdoor: giantpune
    Duct tape guru: jcase
    bootloader: Team Codefire http://xdaforums.com/showthread.php?t=2001655
    Testers: Shados and germes81m

    Donations:
    For giantpune : Paypal to giantpune@gmail.com
    For jcase : http://xdaforums.com/donatetome.php?u=2376614

    Download: http://d-h.st/d6p

    Files: (Verify the MD5s before proceeding)
    MD5 (boot.img) = 175c1bdaabbbbcbd7a4b69a315057e5b
    MD5 (hotplug) = 9fbef20822281a2dd546b3e43d8c30dd
    MD5 (lk.img) = bc54a6a730658550713a0779b30bf6b7
    MD5 (unlock.sh) = 3871c2dde3d6b1d99d27ffa4021c81d3


    Fastboot Drivers (needed for windows):
    http://xdaforums.com/showthread.php?t=1996051

    Notice:
    This is an at your own risk kind of thing, if your phone becomes damaged or data lost, your
    fault not mine. This does install a unsecured (ro.secure=0) boot image in the process, this
    does potentially open your device to security risks (as do most customized firmwares.)


    Story:
    The Docomo Optimus G ships with a mandatory access control system, that prevents
    remounting system, reading boot, executing some things as root, etc general pain in the butt.

    We are using a backdoor found by giantpune (and later by Juggie). The backdoor is partially
    broken on this device due to the MAC, so it does not yield a root shell for us. However we
    can still use it with a couple extra steps to unlock the bootloader\s. We are also going to
    install a modified boot img, that removes some of the phone's security features, and allows
    us to actually have root access.

    Notes:
    Graphic glitches will occur while in the bootloader, you will have to use the bootloader 'blind'


    Follow directions exactly.

    Directions:


    Code: 
    adb push lk.img /data/local/tmp/lk.img

adb push unlock.sh /data/local/tmp/unlock.sh

adb shell chmod 755 /data/local/tmp/unlock.sh

adb shell touch /sdcard/g_security

    Disable USB Debugging, then enable usb debugging

    Code: 
    adb shell id

    Should recieve an error about not executing /system/bin/sh, this is what we want. If you
    don't have the error, start over.

    Code: 
    adb push hotplug /proc/sys/kernel/hotplug

    Now toggle bluetooth once, and wait for your phone to display a garbaled screen (the bootloader).
    If it displays a blank screen instead of a garbled screen, pull battery, reboot and run 'adb reboot bootloader'

    Code: 
    fastboot devices

    If you see your device listed, continue. If not then find the proper drivers, and then
    continue.

    Code: 
    fastboot flash boot boot.img
fastboot reboot
adb shell /sbin/rootme.sh

    If your phone does not reconnect to your mobile network, try rebooting it serveral times.
    If it does not still, then reflash stock firmware.

    We are using supersu, and the app https://play.google.com/store/apps/details?id=eu.chainfire.supersu
    is needed.
    View
    3
    jcase
    jcase
    It failed, Docomo used a MAC (ccs-init/ccs-audit). We got the bootloader unlocked yesterday, so we can removed the access control. I'll post details in the morning.

    xonar_ said:
    What does logcat say?

    Try creating a minimalistic binary

    Code: 
    #include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>

int main()
{
  if(setuid(0)==-1)
  {
    printf("Failed Setting Root UID : %s",strerror(errno));
  }
  else
  {
    printf("Success!\nCurrent UID : %d",getuid());
  }

  return 0;
}
    Click to expand...
    Click to collapse
    View
    1
    jcase
    jcase
    Misudoll said:
    use the lg flash tool and .tot file.uploading complete,you may download now and make a mirror if possible.I'll post a guide on our group later.
    still cannot find the kdz file of this device...

    ---------- Post added at 09:01 AM ---------- Previous post was at 08:41 AM ----------



    it's an amazing job indeed. we're really grateful for what you've done on rooting the L-01E.:good::good::good:
    do i have the permission to reprint this thread on other bbs in my country? I'll indicate the source of course.

    THX again for rooting L-01E:fingers-crossed:
    best regards.
    Click to expand...
    Click to collapse


    Repost as you wish, would be nice to have the README stay intact, as well as linking to the source.
    View
    1
    C
    chacho_2me
    so looks like I am one of the first to confirm JCASE and his friends Rooting Procedure... ITS WORKING!!!!!

    but please be informed that since I had problems installing fastboot on windows... i used my Fedora to be safe... but I believe once you are sure with your fastboot drivers..then you too will not have any problems

    I know I may look redundant..but I want to share what I did so that some people can follow because I myself had some issues...

    so here goes.

    * my system was fedora 18 32bit

    1. I searched for android on the fedora package manager
    - Android Platform Tools (adb,fastboot)
    2. Downloaded the files as per sir JCASE
    3. on terminal, I followed this Commands

    adb push lk.img /data/local/tmp/lk.img

    adb push unlock.sh /data/local/tmp/unlock.sh

    adb shell chmod 755 /data/local/tmp/unlock.sh

    adb shell touch /sdcard/g_security

    4. Was kinda nervous about Disabling and Re-enabling USB DEBUGGING,

    so what I did is that I disconnected and reconnected my phone :)

    5. verified if my device is still seen by adb via this command

    adb devices

    6. once verified, then do this command

    adb shell id

    7. and I smiled when I had the error

    ---not executing /system/bin/sh

    8. next was this command

    adb push hotplug /proc/sys/kernel/hotplug

    9. Then I just Clicked the BLUETOOTH ICON in the STATUS BAR and then I did had the Screen Issue (and yup it is normal)

    10. CHecked if my device is connected via fastboot by this command

    fastboot devices

    11. Once my Device was seen, i followed these commands

    fastboot flash boot boot.img

    fastboot reboot

    12. after few seconds of reboot..I did this command


    adb shell /sbin/rootme.sh

    13. Then there was the note to install SuperSU

    14. After installation, I had some issues with network..so i restarted 2x

    15. And now I have Root, I just installed Cache Mate just to make sure and it worked


    Sorry Sir Jcase for being redundant

    anyway, this will not happen without the help of sir JCASW..so in behalf of all the L-01E Users, THANK YOU SO MUCH!!!!

    maybe this week..i will treat you with some coffee or beer.. hahahaha.. CHEERS!!!


    ***PLEASE TAKE NOTE THE COMMANDS from sir JCASE.. maybe due to my excitement, maybe i had some mixed up with the commands..

    again sir JCASE..thank you so much!!!
    View
    1
    jcase
    jcase
    Misudoll said:
    so at this step just click the bluetooth button once and that will do
    am I right dude ?
    congratulations you finally get the device root :D

    Sent from my LG-F160L using xda premium
    Click to expand...
    Click to collapse

    Yes toggle is turn off or on.
    View

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