[Solved] Unbricking Solution for LG Nitro HD | Confirmed Working on Bell Optimus

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Malnilion

Senior Member
Dec 21, 2011
883
211
Standard disclaimer:
This tutorial is for people who have bricked their phone due to messing about with important files/partitions on their Nitro HD and found that it won't boot up afterward. Prior to attempting this, see if you can access your phone while booting with adb in order to fix your problem. The method used in this tutorial should only be used as a last resort. Don't hold me responsible if this method somehow makes your problem worse (although, really, how much worse can it get than a phone that won't boot?).

Now that's out of the way, let's move on...

Things you'll need:
1) ADB: You can get this in the Android Developer SDK <-Once installed, install platform-tools and add the directory containing ADB to your PATH. Alternately, you can just grab the ADB folder from your SuperOneClick folder, copy it to C:/, and then add that directory to your PATH. Hell, you could even run all the commands from wherever you have the ADB folder, just make sure you have it.
2) LG P930 drivers: http://s3.amazonaws.com/lgforum.com/resources/assets/680/original/LGP930.zip
3) LG Mobile Software Update Tool: http://csmg.lgmobile.com:9002/client/app/B2CAppSetup.exe
4) UpTestEX_mod2_marwin/KDZ_FW_UPD_EN: http://www.filesonic.com/file/2255759914/KDZ_FW_UPD_EN.zip
5) LG SU-640 firmware V10F_00.kdz: http://www.megaupload.com/?d=31XABWWJ
6) A method of rooting your phone. My preferred method is the latest SuperOneClick due to its simplicity. I won't really cover how to root your phone in this tutorial as it's covered elsewhere.

The following should only need to be downloaded if you were stupid like me and bricked your device before you made backups of the necessary partitions (This will be explained elsewhere, but needless to say it's as simple as switching the "if=" argument and "of=" argument in the dd commands toward the bottom):
7) boot.img: http://fileape.com/dl/OCowIxMnbDUMiPW6
8) recovery.img: http://fileape.com/dl/jFMlB8I3kkSMOYWN
9) firmware.img: http://fileape.com/dl/4gHHDDUhODLiJGHM
10) baseband.img: http://fileape.com/dl/TMsvdaKOa7VG4mVT
11) system.img: http://depositfiles.com/files/f0ke241ew

Alright, now that you have everything you need, let's move on to fixing your phone. I'm going to assume you are competent enough to install ADB (Android SDK or folder included to with SuperOneClick) to your system PATH. Go ahead and install the LG Mobile Software Tool and then install the drivers for LG P930 if you haven't already. Extract the KDZ_FW_EN.zip file. Note, in my case, I didn't have to do anything with the mfc42.dll or run WindowsEnabler as mentioned in similar tutorials elsewhere, but your mileage may vary.

Flashing the SU-640 rom:
1) Put your phone in download mode: power off the phone if it's not already, unplug the usb charging cable, and simultaneously hold the volume up button and plug the usb charging cable back in.
2) Open up UpTestEX_mod2_marwin. (If you know what you're doing, I've been told you can use KDZ_FW_UPD_EN as well, but since I didn't use it, I'm not going to discuss it)
3) Hit the folder icon next to the "Select kdz file" line and browse to the SU-640 v10f_00.kdz
4) Select "CSE web upgrade test", a new window with some options including an "Upgrade Start" button should appear.
5) Take a deep breath...there's no going back :) Press "Upgrade Start".
6) At this point in time another dialog box will appear asking what country and language the LG Mobile Upgrade tool should use. Since this guide is written in English, I assume you'll want to change it from Republic of Korea to All other countries and Korean to English. This affects the language that output messages are displayed in in the LG Update tool only, it doesn't affect anything with the rom (that'll be all Korean on initial startup lol).
7) The update tool will proceed to flash your phone, but it should never complete "normally" (mine never made it past 4% according to the tool and other users have reported similar behavior). However, your phone should reboot once or a couple of times and then just be sitting idle waiting for you to go through the setup wizard. At this point, just kill the LG update tool process in task manager, don't wait for it to complete because it won't.

Rooting your phone:
1) Now, on your phone you should see the standard Android startup wizard...in Korean. Hit the left button confirming you want to go through it, and on the next screen should be an option to switch the language to English. Ah, much better.
2) Go through the rest of the setup wizard if you want, but it's not necessary and you won't be able to set up accounts anyway unless you somehow have wifi.
3) Put the phone in USB debug mode and allow 3rd party sources. Don't freak out if the phone spontaneously reboots when you do this. It rebooted on me every single time I put it into debug mode for the first time (I flashed it several times lol).
4) Once it's rebooted itself, you should be able to connect in debug mode and connect via PC mode. Go ahead and root it using your preferred method. We're almost there!

Restoring Nitro HD partition images:
1) Open up a command prompt and navigate to the folder you saved your recovery images to (hopefully you put them in the same folder, it'll make your job easier)
2) Push all the image files to the phone's sdcard using the command:
Code:
adb push filename.img /sdcard
Alternately, you can just mount up your phone in My Computer and copy and paste the files over.
3) Now the real fun begins! Use the following commands:
Code:
adb shell
su
dd if=/sdcard/boot.img of=/dev/block/mmcblk0p8
dd if=/sdcard/recovery.img of=/dev/block/mmcblk0p13
dd if=/sdcard/firmware.img of=/dev/block/mmcblk0p1
dd if=/sdcard/system.img of=/dev/block/mmcblk0p27
dd if=/sdcard/baseband.img of=/dev/block/mmcblk0p14
4) You won't be able to issue a reboot command, so just hold power down on your phone til it's off and hold the volume down button so that it comes back up in factory data reset mode. You will want to pull your sdcard at this time if you don't want your data erased.
5) Hit power twice and your phone should go through its reset process and (hopefully!) come back up in a working (and rooted) AT&T "stock" rom :D


If you have any issues, it's possible I've forgotten some steps, so I'll address them in this thread. At this point, I'd like to thank specific people who helped me immensely getting a working phone again: bytecode64, gordec, schwin97, belth219, sukudos, and ziiljuks. (If I've missed you, I'm sorry, I'm thankful to this entire forum!)

Original post:
So I was messing with fonts (actually trying to get the "look of disapproval" from Reddit to display) and substituted DroidSansFallback with a kannada font using Font Installer *Root*. Well, long story short, it was causing issues with other non-english characters so I tried to restore *all* my fonts using the "stock" option that comes with Font Installer.

When I rebooted, my phone only got to the LG Screen and that's as far as it has gotten since. I can't do anything with it, but I can get to Factory Data Reset mode and Download mode. I tried plugging the phone into my computer, but it doesn't appear to get far enough to mount the disk. Odin recognizes it's attached when I put it in download mode, but obviously Odin doesn't work with our phones.

Does anyone know if there will ever be hope for my phone or should I pursue getting a replacement? I'm actually completely shocked that simply replacing fonts has bricked my phone to the point where it doesn't even boot. This has seriously made me reconsider tinkering with Android at all until recovery methods are possible. I'm more than willing to be a guinea pig at this point until I try to send it in for a replacement (within the next few days probably).
 
Last edited:

hashhash

Member
Mar 30, 2010
11
1
do a factory data reset ? my phone gets stuck on LG logo too when i try to move all my apps to SD using titanium backup . factory data reset option resolves it however . see if that works ?
 

[email protected]

Senior Member
Sep 24, 2007
1,466
194
Unfortunately factory reset won't help in this case, the app messed up something in the system.
But as long as it gets to the point when you can use adb (it comes with SuperOneClick if you don't have it installed), then yes, there still a chance ;)
To make it easier, can you contact the app's author and ask what exactly that app changes in the system, which files, so if necessary we can provide you with these files.
 
Last edited:

Malnilion

Senior Member
Dec 21, 2011
883
211
[email protected],

I have adb from SuperOneClick, how would I know if I can use adb?

Edit, I guess what I'm asking is do you have a quick guide to connecting a phone using adb and pushing files that you can hit me with a link to?
 
Last edited:

schwin97

Senior Member
May 26, 2010
126
33
adb devices

If that comes back with a device listed you can still save your system. Good luck...
 

Malnilion

Senior Member
Dec 21, 2011
883
211
Okay, I'm at work now, but I'll check when I get home. I do believe I tried that command and it didn't show any connected devices, but I can't remember if I only tried that while I had it in Download mode or also while I was trying to boot it. I'm keeping my fingers crossed lol.
 

belth219

Member
Dec 9, 2011
18
0
Shanghai
You should searching for the file named KDZ_FW_UPD_EN,and install LGMobile Support Tool which can be downloaded on the LG Official website.And then you should download the *.kdz file that matches your phone.
Finally launch the KDZ_FW_UPD_EN flash your phone with the kdz file.
I use the tool bring my bricked device back.
Good luck.
 

Malnilion

Senior Member
Dec 21, 2011
883
211
belth219,

Problem is I can't find a .kdz for my P930. This seems like it'd be really easy to do otherwise.
 

Malnilion

Senior Member
Dec 21, 2011
883
211
Alright, I've created a tutorial in the first post describing how I unbricked my phone. I don't think it's quite back to "stock", but I don't think anybody who bricks their phone will care about that.
 

belth219

Member
Dec 9, 2011
18
0
Shanghai
You have done the great job.Thanks for the baseband.img.It made my SU640 closer to PERFECT!EDGE enabled!!

Sent from my LG-SU640 using XDA App
 

Malnilion

Senior Member
Dec 21, 2011
883
211
I can't claim credit (or blame lol) for creating any of the images in this tutorial. Gordec is responsible for 3/5 including the baseband and I am so glad he responded quickly with each image correctly copied!

Sent from my LG-P930 using xda premium
 

Malnilion

Senior Member
Dec 21, 2011
883
211
My 4G wasn't working until I did a factory data reset (a second one, actually). Is it just your LTE that's not working or 4G in general?

Sent from my LG-P930 using xda premium
 
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Sandpapers

Senior Member
Dec 28, 2011
105
12
Will this give a version that has wifi and regular calling available right off the bat? I messed up my nitro to the point that i can only sometimes make phone calls and my market / browser won't function at all. Force close immediately.

Think I should try this as an option?

AT&T LG Nitro HD P930 is my make


Also, I use it on TMobiles prepaid network. I only get edge. I checked the bands, I think im right but wanted reassurance that edge is all i can get. Thx
 

repherb

Senior Member
Aug 7, 2008
180
62
Milky Way
To the best of my knowledge, prepaid service providers only allow maximum 4G, but vary by provider. No prepaid that i know of allows access to the LTE network, only on a post-paid plan.

If you have a AT&T unit unlocked for use on another carrier, then there's not much you can do in this case. sorry.
 

Sandpapers

Senior Member
Dec 28, 2011
105
12
csmg.lgmobile.com:9002/swdata/WEBSW/LGSU640/ASKTBK/V10i_00/V10i_00.kdz

I couldn't get the version with the f's in the original post to work. Will this one do? It's 460 mb.
 

Malnilion

Senior Member
Dec 21, 2011
883
211
Sandpapers,
I'm uploading the V10f_00.kdz to megaupload right now. I'll update my tutorial as soon as it's done. Sorry I didn't do this sooner.

Sent from my LG-P930 using xda premium
 
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  • 6
    Standard disclaimer:
    This tutorial is for people who have bricked their phone due to messing about with important files/partitions on their Nitro HD and found that it won't boot up afterward. Prior to attempting this, see if you can access your phone while booting with adb in order to fix your problem. The method used in this tutorial should only be used as a last resort. Don't hold me responsible if this method somehow makes your problem worse (although, really, how much worse can it get than a phone that won't boot?).

    Now that's out of the way, let's move on...

    Things you'll need:
    1) ADB: You can get this in the Android Developer SDK <-Once installed, install platform-tools and add the directory containing ADB to your PATH. Alternately, you can just grab the ADB folder from your SuperOneClick folder, copy it to C:/, and then add that directory to your PATH. Hell, you could even run all the commands from wherever you have the ADB folder, just make sure you have it.
    2) LG P930 drivers: http://s3.amazonaws.com/lgforum.com/resources/assets/680/original/LGP930.zip
    3) LG Mobile Software Update Tool: http://csmg.lgmobile.com:9002/client/app/B2CAppSetup.exe
    4) UpTestEX_mod2_marwin/KDZ_FW_UPD_EN: http://www.filesonic.com/file/2255759914/KDZ_FW_UPD_EN.zip
    5) LG SU-640 firmware V10F_00.kdz: http://www.megaupload.com/?d=31XABWWJ
    6) A method of rooting your phone. My preferred method is the latest SuperOneClick due to its simplicity. I won't really cover how to root your phone in this tutorial as it's covered elsewhere.

    The following should only need to be downloaded if you were stupid like me and bricked your device before you made backups of the necessary partitions (This will be explained elsewhere, but needless to say it's as simple as switching the "if=" argument and "of=" argument in the dd commands toward the bottom):
    7) boot.img: http://fileape.com/dl/OCowIxMnbDUMiPW6
    8) recovery.img: http://fileape.com/dl/jFMlB8I3kkSMOYWN
    9) firmware.img: http://fileape.com/dl/4gHHDDUhODLiJGHM
    10) baseband.img: http://fileape.com/dl/TMsvdaKOa7VG4mVT
    11) system.img: http://depositfiles.com/files/f0ke241ew

    Alright, now that you have everything you need, let's move on to fixing your phone. I'm going to assume you are competent enough to install ADB (Android SDK or folder included to with SuperOneClick) to your system PATH. Go ahead and install the LG Mobile Software Tool and then install the drivers for LG P930 if you haven't already. Extract the KDZ_FW_EN.zip file. Note, in my case, I didn't have to do anything with the mfc42.dll or run WindowsEnabler as mentioned in similar tutorials elsewhere, but your mileage may vary.

    Flashing the SU-640 rom:
    1) Put your phone in download mode: power off the phone if it's not already, unplug the usb charging cable, and simultaneously hold the volume up button and plug the usb charging cable back in.
    2) Open up UpTestEX_mod2_marwin. (If you know what you're doing, I've been told you can use KDZ_FW_UPD_EN as well, but since I didn't use it, I'm not going to discuss it)
    3) Hit the folder icon next to the "Select kdz file" line and browse to the SU-640 v10f_00.kdz
    4) Select "CSE web upgrade test", a new window with some options including an "Upgrade Start" button should appear.
    5) Take a deep breath...there's no going back :) Press "Upgrade Start".
    6) At this point in time another dialog box will appear asking what country and language the LG Mobile Upgrade tool should use. Since this guide is written in English, I assume you'll want to change it from Republic of Korea to All other countries and Korean to English. This affects the language that output messages are displayed in in the LG Update tool only, it doesn't affect anything with the rom (that'll be all Korean on initial startup lol).
    7) The update tool will proceed to flash your phone, but it should never complete "normally" (mine never made it past 4% according to the tool and other users have reported similar behavior). However, your phone should reboot once or a couple of times and then just be sitting idle waiting for you to go through the setup wizard. At this point, just kill the LG update tool process in task manager, don't wait for it to complete because it won't.

    Rooting your phone:
    1) Now, on your phone you should see the standard Android startup wizard...in Korean. Hit the left button confirming you want to go through it, and on the next screen should be an option to switch the language to English. Ah, much better.
    2) Go through the rest of the setup wizard if you want, but it's not necessary and you won't be able to set up accounts anyway unless you somehow have wifi.
    3) Put the phone in USB debug mode and allow 3rd party sources. Don't freak out if the phone spontaneously reboots when you do this. It rebooted on me every single time I put it into debug mode for the first time (I flashed it several times lol).
    4) Once it's rebooted itself, you should be able to connect in debug mode and connect via PC mode. Go ahead and root it using your preferred method. We're almost there!

    Restoring Nitro HD partition images:
    1) Open up a command prompt and navigate to the folder you saved your recovery images to (hopefully you put them in the same folder, it'll make your job easier)
    2) Push all the image files to the phone's sdcard using the command:
    Code:
    adb push filename.img /sdcard
    Alternately, you can just mount up your phone in My Computer and copy and paste the files over.
    3) Now the real fun begins! Use the following commands:
    Code:
    adb shell
    su
    dd if=/sdcard/boot.img of=/dev/block/mmcblk0p8
    dd if=/sdcard/recovery.img of=/dev/block/mmcblk0p13
    dd if=/sdcard/firmware.img of=/dev/block/mmcblk0p1
    dd if=/sdcard/system.img of=/dev/block/mmcblk0p27
    dd if=/sdcard/baseband.img of=/dev/block/mmcblk0p14
    4) You won't be able to issue a reboot command, so just hold power down on your phone til it's off and hold the volume down button so that it comes back up in factory data reset mode. You will want to pull your sdcard at this time if you don't want your data erased.
    5) Hit power twice and your phone should go through its reset process and (hopefully!) come back up in a working (and rooted) AT&T "stock" rom :D


    If you have any issues, it's possible I've forgotten some steps, so I'll address them in this thread. At this point, I'd like to thank specific people who helped me immensely getting a working phone again: bytecode64, gordec, schwin97, belth219, sukudos, and ziiljuks. (If I've missed you, I'm sorry, I'm thankful to this entire forum!)

    Original post:
    So I was messing with fonts (actually trying to get the "look of disapproval" from Reddit to display) and substituted DroidSansFallback with a kannada font using Font Installer *Root*. Well, long story short, it was causing issues with other non-english characters so I tried to restore *all* my fonts using the "stock" option that comes with Font Installer.

    When I rebooted, my phone only got to the LG Screen and that's as far as it has gotten since. I can't do anything with it, but I can get to Factory Data Reset mode and Download mode. I tried plugging the phone into my computer, but it doesn't appear to get far enough to mount the disk. Odin recognizes it's attached when I put it in download mode, but obviously Odin doesn't work with our phones.

    Does anyone know if there will ever be hope for my phone or should I pursue getting a replacement? I'm actually completely shocked that simply replacing fonts has bricked my phone to the point where it doesn't even boot. This has seriously made me reconsider tinkering with Android at all until recovery methods are possible. I'm more than willing to be a guinea pig at this point until I try to send it in for a replacement (within the next few days probably).
    3
    As all know a picture worth thousand words, here it is in 7 steps:
    Step 1 and 2


    Step 3


    Step 4 and 5


    After 5 minutes at the count 90 my phone rebooted into new rom:


    Step 6 and 7



    P.S.
    Feel free add it to the original tutorial.
    3
    Hi there,
    I just recovered my bricked phone and I am trying to restore it to the default AT&T state. I found a guide on how to get this accomplished but the links to the files do not work. Does anyone have those files available that they can post somewhere where I can access them. Thanks for your assistance.

    Here are the files that I need.

    7) boot.img: fileape.com/dl/OCowIxMnbDUMiPW6
    8) recovery.img: fileape.com/dl/jFMlB8I3kkSMOYWN
    9) firmware.img: fileape.com/dl/4gHHDDUhODLiJGHM
    10) baseband.img: fileape.com/dl/TMsvdaKOa7VG4mVT

    boot.img
    recovery.img
    firmware.img
    baseband.img


    now those are from my dropbox they will be active untill it gets flooded with traffic lol enjoy man
    2
    Here is dropbox mirror for all files:
    http://db.tt/ntwJEuch