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Old May 7th, 2013, 02:13 AM   #1 (permalink)
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Default [ROOT][OUDHS] Spirited Away: RCT Nerfer Edition :: 5/7/13 :: FULL TECHNICAL NOTES INSIDE

k0nane and the Official Unloved Devices Hit Squad present...
Spirited Away: RCT Nerfer Edition
With thanks to Dan Rosenberg and the original Spirited Away he created!


Root! Root, root root, root.

Verizon doesn't want you to have it. The OUDHS does! At the behest of everyone's favorite giant, oligopolist, anti-consumer, borderline-evil carrier, LG stuck what they call the Root Checker Tool (RCT) into the guts of the Lucid 2. Not yet seen on other LG models, the RCT checks for - and perhaps prevents the execution of - certain root tools. It also leaves logs of the presence or running of said tools. See the second post for more details.

This package cuts off RCT's head and gives you - not your carrier or the OEM - a bit more control over your phone. This does not unlock the bootloader, unfortunately. It's just root.

Code:
#include <external/cyanogenmod/std_disclaimer.h>
/*
 * I am not responsible for bricked devices, dead SD cards,
 * thermonuclear war, or you getting fired because the alarm app failed. Please
 * do some research if you have any concerns about features included in this ROM
 * before flashing it! YOU are choosing to make these modifications, and if
 * you point the finger at me for messing up your device, I will laugh at you.
 */
Instructions

  1. Download the package.
  2. Extract the contents of the zip.
  3. Ensure you have installed the drivers for your phone.
  4. Connect it to USB, wait for it to be detected.
  5. Double-click run.bat, follow on-screen instructions. Mac and Linux users, open the file and follow along, it's just a set of ADB commands.
  6. Let it finish, continuing to follow instructions.

That's it! Your device will autoreboot. You will be rooted.

FAQ

Q: What does this install?
A: Your device will have Superuser (ChainsDD's variant, the original), the su binary, and BusyBox 1.20.2 on it.

Q: Can I use this on a device that isn't the Verizon-model LG Lucid 2?
A: That's a bad idea. Don't do that. Don't whine to us if you break stuff by doing so.

Q: Will this survive OTAs?
A: Probably not, and it's almost guaranteed that RCT will come back with a vengeance! Be very careful with updates!

Q: I've tried to root already, can LG/Verizon tell?
A: Unless you reset what's already been written, they sure can. See the next post.

Downloads



Credits:


  • Shabbypenguin: making me aware of the issues on this device, initial testing, general awesomesauce
  • SICFreak: remote access to two devices, time, taking the risk, patience
  • Dan Rosenberg (@djrbliss): Spirited Away exploit, reverse engineering of rctd post-root
  • The OUD Hit Squad: for being made of either unstable isotopes of uranium, or pure greatness, one of the two
  • LG and Verizon: just kidding, f*ck you both


Donations

This is not, and will never be donationware. However, bandwidth and time isn't free. Your generosity - if you feel like showing it - is highly appreciated! Thank you!

Donate to Dan Rosenberg:

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Old May 7th, 2013, 02:13 AM   #2 (permalink)
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Technical Details

Just what do we know about RCT? RCT, the Root Checker Tool, has one primary purpose: to make persistent note of any presence of rooting-related tools, the running of su, or the remounting of the system partition as read-write. The main "meat" of the tool - if not all of it - is in /system/bin/rctd. Mr. Rosenberg was kind enough to decompile and analyze the tool, and state that it checks for the following files:

  • /system/[bin,sbin,xbin]/su
  • /sbin/su
  • /data/local/tmp/su
  • /system/app/[s,S]uper[u,U]ser.apk,
  • /data/data/com.noshufou.android.su
  • /data/local/tmp/[s,S]uper[u,U]ser.apk
  • /system/[bin,xbin]/busybox
  • /data/local/tmp/busybox
The tool writes a hexadecimal number to /persist/rct and /data/system/lgmdm_root_flags.txt (these files are identical in contents) that represents the "root status". Mr. Rosenberg confirms that "[the] number is an encoded representation of whether su, Superuser, busybox, etc. are installed". The tool writes a human-readable representation of what it's found to /persist/rct.cfg. An example from a rooted system (if used on a previously-virgin system, this package will prevent this from being written):


Code:
Rooted

 Not allowed command had been executed.
  > su
 Mount option had been changed.
  > /system
 Rooting related file had been installed.
  > su
  > superuser
  > busybox

[LG RCT v1.0.1220]
A "clean" system will display "not rooted" and nothing else except the bottom line.

RCT also writes copies of ls -l /, portions of /dev/log/main and /dev/log/system, ls -l /system/app, ls -l /persist/LostFound, df -h, and basic system information (see below) to files named after asteroids and stored in /persist/LostFound.

Code:
VS870 4G
Model name : L1v
Manufacture : LGE
OS Version : 4.1.2
Secure : 1
Operator : Verizon Wireless
Country : US
Product version : M8960A-AAAANAZM-3.0.0743
Build date : Wed Mar  6 21:51:54 KST 2013
RCT may have other functions. rctd only does what's described above - it's a logger and nothing more, according to Mr. Rosenberg. There may be other portions of the system, but I have not found them.

I do have "clean" copies of the entire /persist and lgmdm_root_flags.txt, but due to the sensitive nature of some of the logs, and to protect the privacy of my tester, I prefer not to publicly distribute them. If anyone needs them, please contact me here, on XDA, Twitter, or chat.freenode.net #oudhitsquad.

How RCT Starts/Is Triggered

rctd, the main daemon that makes up RCT, is started as a system service in init.l1v.rc. I seem to have misplaced my copy of this file/the kernel, but it's a very standard service start. As the bootloader is currently locked, there's not much that can be done about this.

Inside com.lge.systemservice.core, BootCompletedReceiver waits for the BOOT_COMPLETED signal to be thrown, then executes the following:

Code:
const-string v1, "ro.build.target_operator"

    const-string v2, ""

    invoke-static {v1, v2}, Landroid/os/SystemProperties;->get(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;

    move-result-object v1

    const-string v2, "VZW"

    invoke-virtual-quick {v1, v2}, vtable@0x18

    move-result v1

    if-eqz v1, :cond_1d

    .line 12
    new-instance v0, Landroid/content/Intent;

    invoke-direct {v0}, Landroid/content/Intent;-><init>()V

    .line 13
    .local v0, mServiceIntent:Landroid/content/Intent;
    const-string v1, "com.lge.action.ROOTINGCHECKER"

    invoke-virtual-quick {v0, v1}, vtable@0x6c

    .line 14
    invoke-virtual-quick {p1, v0}, vtable@0x60

    .line 16
    .end local v0           #mServiceIntent:Landroid/content/Intent;
    :cond_1d
    return-void
For those of you who don't speak smali, the real juicy bit of that appears as the following, when run through dex2jar:

Code:

if (SystemProperties.get("ro.build.target_operator", "").equalsIgnoreCase("VZW"))
    {
      Intent localIntent = new Intent();
      localIntent.setAction("com.lge.action.ROOTINGCHECKER");
      paramContext.startService(localIntent);
    }
Yes, it really is just checking an item in build.prop to see whether it should run or not. That's an alternate way to stop rctd, but not one that I like. It is safe to remove the entirety of BootCompletedReceiver.smali, and for anyone working on modifications in the future, I would do so.

As you can see, an intent is thrown, and caught by rctd, which does its thing. It (rctd's main function) seems to run once per boot, but I cannot guarantee that.

Other Framework/System Finds

com.lge.mdm contains one item of interest. The rest of the framework, and /system/app, is largely clean. LGMDMGeneralController is the file of interest, and for the sake of readability in this post, I've run it through dex2jar. Here it is: Pastie This class contains a lot more than just RCT-related items, many potentially worth investigating.

Other things of note:
  • Viewing strings of other binaries, including those pertaining to FOTA, indicate the presence of "rooting history tables". Where these are, I don't know, and it could be as simple as what's already outlined here. Do proceed with caution, particularly around updates, as the updater system is rife with checks and logging for modifications.
  • There's an "ATS Agent" of some type hanging out in the framework. Its purpose is to take logs, and it may be responsible for the asteroid-namesake files. It is not present on the international model, thus can be assumed to be specific to VZW. Proceed with caution. I am automatically suspicious of these "diagnostic" tools after CIQ.
  • There's a GUI for RCT's output. See below.
Finally, I found some dialer codes. There's fun to be had here - proceed with caution, but enjoy Verizon/LG's hidden menu, and see what's to be seen in the Rooting Check entry (RootingCheck class inside the hidden menu apps/JARs).


A Message for Verizon and LG

Teehee, you guys are funny. This wasn't hard, no more than Samsung's silly attempt to block package installation back on the Galaxy Indulge 4G (on MetroPCS). Go ahead and keep trying to prevent your users from controlling their devices... it's a losing battle.

Oh, and suck me. (And Dan.)

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Old May 7th, 2013, 03:06 AM   #3 (permalink)
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I'll take one more just in case.

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Old May 7th, 2013, 01:26 PM   #4 (permalink)
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Oh thank you...thank you..thank you..I have waited for this. Also, this by far has been the easiest root I have ever done. I will definitely be donating. YOu guys are awsome
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Old May 7th, 2013, 02:26 PM   #5 (permalink)
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So... I'm inept and can't follow instructions. I've installed the latest drivers for the lg lucid 2 (for some reason it doesn't show up in my device manager when in charge mode) and usb debugging is enabled. When I run the bat file (in charge mode, I'm assuming) all it does is: 'Daemon not running. Starting it now. Daemon Started Successfully'

Thanks for the root guys, it's much appreciated, hopefully I can get it working today.
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Old May 7th, 2013, 02:40 PM   #6 (permalink)
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Quote:
Originally Posted by perry475 View Post
So... I'm inept and can't follow instructions. I've installed the latest drivers for the lg lucid 2 (for some reason it doesn't show up in my device manager when in charge mode) and usb debugging is enabled. When I run the bat file (in charge mode, I'm assuming) all it does is: 'Daemon not running. Starting it now. Daemon Started Successfully'

Thanks for the root guys, it's much appreciated, hopefully I can get it working today.
I have the same issue as you, i'm wondering is windows 8 is the issue?
Also i tried the one sicfreak posted a little while ago before this one but it obviously didnt work. can something from that be affecting this? did i somehow trigger the rct already?
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Old May 7th, 2013, 02:48 PM   #7 (permalink)
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@Nikguy, I'm going to try rooting it on my brother's laptop... I'm running Windows 8 as well, so I guess that may be an issue... I'll report back asap

*EDIT* : So it worked on windows 7... I'm not sure if this method will work on windows 8, but what I did was install the drivers, then after the drivers were done installing I ran the bat file as admin while the phone was on the usb pc connection selection screen (In other words, I didn't select anything on that screen, I just left it there). It worked instantly
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Old May 7th, 2013, 02:57 PM   #8 (permalink)
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when the phone is plugged up to usb and comp change the charge settings to: Internet connection...then ethernet. That is how I got mine to show up
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Old May 7th, 2013, 03:45 PM   #9 (permalink)
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Edit- Deleted long log
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Old May 7th, 2013, 03:59 PM   #10 (permalink)
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Quote:
Originally Posted by perry475 View Post
So... I'm inept and can't follow instructions. I've installed the latest drivers for the lg lucid 2 (for some reason it doesn't show up in my device manager when in charge mode) and usb debugging is enabled. When I run the bat file (in charge mode, I'm assuming) all it does is: 'Daemon not running. Starting it now. Daemon Started Successfully'

Thanks for the root guys, it's much appreciated, hopefully I can get it working today.
Put it into media sync (mtp) mode, and you'll have it.
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Old May 7th, 2013, 04:03 PM   #11 (permalink)
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Nikguy, the latest drivers are available on the lg support site. Look for the 870 on metropcs
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Old May 7th, 2013, 04:28 PM   #12 (permalink)
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Quote:
Originally Posted by SicFreak View Post
Nikguy, the latest drivers are available on the lg support site. Look for the 870 on metropcs
strange, that is what i did, but it also went on ahead and auto installed drivers of some sort right after i plugged it in. Do you think my issue is a driver problem? I might be able to install the driver on a new computer then turn off the internet connection and try again to prevent the auto-downloading of the drivers when i plug my phone into that one..?
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Old May 7th, 2013, 04:37 PM   #13 (permalink)
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You know mine said the same thing that yours did. I have root access and super user, but no busybox.
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Old May 7th, 2013, 05:04 PM   #14 (permalink)
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Quote:
Originally Posted by to3kn33 View Post
You know mine said the same thing that yours did. I have root access and super user, but no busybox.
well i have super user but no root or busybox. IDK why im getting "file exists" and read only errors. Im pretty sure the drivers are correct
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Old May 7th, 2013, 06:10 PM   #15 (permalink)
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Quote:
Originally Posted by Nikguy View Post
well i have super user but no root or busybox. IDK why im getting "file exists" and read only errors. Im pretty sure the drivers are correct
Please remove the incredibly long log you pasted above. I suspect both you and to3kn33 attempted to root before this package, correct?
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Old May 7th, 2013, 06:16 PM   #16 (permalink)
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Yes i did. I could attempt a factory reset if you think it would be needed.
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Old May 7th, 2013, 07:09 PM   #17 (permalink)
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Quote:
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Yes i did. I could attempt a factory reset if you think it would be needed.
The easiest thing to do would certainly be to flash the KDZ in this forum.
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Old May 7th, 2013, 07:12 PM   #18 (permalink)
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The easiest thing to do would certainly be to flash the KDZ in this forum.
Ok, that makes sense, thank you for the help!
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Old May 7th, 2013, 07:16 PM   #19 (permalink)
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This worked perfectly! Thanks!
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Old May 7th, 2013, 09:00 PM   #20 (permalink)
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KDZ????
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Old May 7th, 2013, 09:07 PM   #21 (permalink)
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KDZ????
See the stickies.
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Old May 7th, 2013, 11:01 PM   #22 (permalink)
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worked great thanks!
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Old May 7th, 2013, 11:12 PM   #23 (permalink)
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worked great thanks!
Good, thanks for your support.

Mod, thanks for the sticky.
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Old May 7th, 2013, 11:24 PM   #24 (permalink)
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Good, thanks for your support.

Mod, thanks for the sticky.
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Old May 8th, 2013, 01:25 AM   #25 (permalink)
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That was me
Oh, okay. Well thanks.
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Old May 9th, 2013, 04:43 PM   #26 (permalink)
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Konane you are one smart cookie thanks and we all appreciate it!
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Old May 9th, 2013, 07:34 PM   #27 (permalink)
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it didn't work! said everything installed but superuser doesnt show up and I have no root =( what should i do?
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Old May 9th, 2013, 07:39 PM   #28 (permalink)
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Quote:
Originally Posted by Zarako View Post
it didn't work! said everything installed but superuser doesnt show up and I have no root =( what should i do?
Follow the "unbrick/unroot" guide also in this forum then try again. It doesnt seem to delete anything you have on your phone either.

ps, before you root, are you able to use any sort of tether app? For some reason I cant and I'm not sure if the root is the cause.
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Old May 9th, 2013, 07:56 PM   #29 (permalink)
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the only problem I have is that the root doesn't show up everything else works great.
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Old May 10th, 2013, 01:16 AM   #30 (permalink)
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the only problem I have is that the root doesn't show up everything else works great.
Your statement doesn't make sense.

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ps, before you root, are you able to use any sort of tether app? For some reason I cant and I'm not sure if the root is the cause.
Both are highly unlikely.
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Old May 10th, 2013, 10:36 AM   #31 (permalink)
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Follow the "unbrick/unroot" guide also in this forum then try again. It doesnt seem to delete anything you have on your phone either.

ps, before you root, are you able to use any sort of tether app? For some reason I cant and I'm not sure if the root is the cause.
Unbrick only flashes over /system. Not /data
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Old May 10th, 2013, 11:28 AM   #32 (permalink)
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Yes i have superuser and it won't uninstall but when I run the binary check it says root check failed. I have root 10 different phones for myself and friends and tablets. I know when a root isn't working properly, I just used the unbrick process and tried to root again and the .bat file doesn't run on MTP for me for some reason just freezes up at daemon starting. successfully started.
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Old May 10th, 2013, 12:55 PM   #33 (permalink)
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Ok so I hit go and then just left my phone on daemon successfully started after about 30 mins it finally ran and the root is now verified and works great. Thanks k0nane always been a fan =)
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Old May 11th, 2013, 04:03 AM   #34 (permalink)
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Your statement doesn't make sense.


Both are highly unlikely.
huh ok. This is a little off topic but does anyone know how to put system apps back in? or where to find them? Or at least how to fully factory reset the phone rather than the unbricking guide?
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Old May 11th, 2013, 08:53 AM   #35 (permalink)
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huh ok. This is a little off topic but does anyone know how to put system apps back in? or where to find them? Or at least how to fully factory reset the phone rather than the unbricking guide?
Hold volume down + power while booting phone.
This will only erase app data and all your settings. If you want to reinstall system apps, someone will have to upload it.
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Old May 11th, 2013, 12:54 PM   #36 (permalink)
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Huh OK... I'll try it. Seems like an odd way to do it but this phone seems to have a lot of odd features.

Edit- all resolved, ill try the tether when it boots

Edit2- after factory reset and unbrick method tether still will not work.
Has anyone been able to use tether apps on the lucid 2 or is it just a general glitch or defect of this model and software version?
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Old May 12th, 2013, 07:36 AM   #37 (permalink)
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Huh OK... I'll try it. Seems like an odd way to do it but this phone seems to have a lot of odd features.

Edit- all resolved, ill try the tether when it boots

Edit2- after factory reset and unbrick method tether still will not work.
Has anyone been able to use tether apps on the lucid 2 or is it just a general glitch or defect of this model and software version?
are you using a third party app or the mobile hotspot app
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Old May 12th, 2013, 10:06 AM   #38 (permalink)
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are you using a third party app or the mobile hotspot app
3Rd party
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Old May 12th, 2013, 10:45 PM   #39 (permalink)
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i cant seem to figure out what to do please help!
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Old May 15th, 2013, 09:05 PM   #40 (permalink)
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how do i take screen shots like that.
because mine isnt seeming to root either.

it just gets to nerfing rct then it sits there.
unless i reboot then it goes past that does some errors and says click anything to continue

*Edit*
i ran it as an adminstrator and it worked
thank you so much
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Old May 16th, 2013, 12:24 AM   #41 (permalink)
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you guys need to do the "unroot/unbrick" guide first then try again. It happened to me but after that it worked fine. It won't delete any data so no worries.
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Old May 26th, 2013, 07:59 PM   #42 (permalink)
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Default Attempting to root my Lucid 2

Today has been my first attempt at rooting a phone. I have to say it is frustrating. I have read the thread and attempted to follow the wonderful advise that you all gave but am still having trouble. I keep getting the same message when I attempt to run the bat file. The message that "Daemon not running. starting it now. Daemon started succesuflly" I have attempting to flash the KDZ but feel I must be doing something wrong. Help.
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Old May 26th, 2013, 08:10 PM   #43 (permalink)
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Today has been my first attempt at rooting a phone. I have to say it is frustrating. I have read the thread and attempted to follow the wonderful advise that you all gave but am still having trouble. I keep getting the same message when I attempt to run the bat file. The message that "Daemon not running. starting it now. Daemon started succesuflly" I have attempting to flash the KDZ but feel I must be doing something wrong. Help.
Maybe someone else has a better solution but you could try to factory reset then run the batch file again. If you dont know how to do that,, you just reboot the phone while holding down the bottom volume key, then it will ask if you want to reset. Might as well give it a try seeing that it wont make anything worse, then by that time if you still have questions hopefully someone more knowledgeable will respond to you.
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Old May 27th, 2013, 07:10 AM   #44 (permalink)
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Originally Posted by dwc77 View Post
Today has been my first attempt at rooting a phone. I have to say it is frustrating. I have read the thread and attempted to follow the wonderful advise that you all gave but am still having trouble. I keep getting the same message when I attempt to run the bat file. The message that "Daemon not running. starting it now. Daemon started succesuflly" I have attempting to flash the KDZ but feel I must be doing something wrong. Help.
Did you enable USB debugging??
Did you install drivers??
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Old May 30th, 2013, 07:49 AM   #45 (permalink)
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I do have the debugging enabled, and I installed the drivers. My computer keeps trying to reinstall the drivers.
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Old May 30th, 2013, 09:30 AM   #46 (permalink)
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I do have the debugging enabled, and I installed the drivers. My computer keeps trying to reinstall the drivers.
Let it finish installing them.
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Old June 14th, 2013, 04:21 AM   #47 (permalink)
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Thank you very much for this, you will be getting a donation from me ASAP.

To anyone else getting stuck at the "Starting Deamon" part, you'll never guess what I had to do to get it to work.

Install the drivers.

I know it's in the instructions, and yes, the first thing I did was downloaded and install the drivers for it from the other thread here, but it still didn't want to work. However, when you plug the damn thing in, there is a autostart popup with an LGsetupVZWireless.exe or something like that. I had never run it before, but I've been copying shit to my phone with no problem at all without running it, so I figured it would work. Mind you, I figured the drivers I had downloaded from here were the same as the ones included on the phone, but apparently they are not.

Maybe it's just me, but yes, I feel super derpy for pulling my hair out before running the stupid autolaunch driver setup when you plug the phone in. Enjoy the laugh at my expense, it's the least I can do. ;-)

Anyway, I'm using windows 7 and as soon as I let it install those drivers included on the phone, it worked like a charm. Oh, is it just me, or does debugging mode not start up in MTP mode? I had to use the internet connection mode to get it to come up in USB debugging mode... But that was the mode it was in before installing the included phone drivers so I could be wrong, just thought I'd pass that along in case it matters.

Thanks so much for this, to everyone involved, you are gods.
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Old July 1st, 2013, 01:06 PM   #48 (permalink)
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Can LG lucid 2 be rooted with any android terminals beside using PC?
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Old July 8th, 2013, 06:23 PM   #49 (permalink)
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Default KDZ link

Trying to grab the kdz link/ zip for my kids LG Lucid 2. Shows super su but no busy box or any thing. Don't want to flash a custom and brick him. Yhanks for any help
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Old July 8th, 2013, 08:55 PM   #50 (permalink)
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Trying to grab the kdz link/ zip for my kids LG Lucid 2. Shows super su but no busy box or any thing. Don't want to flash a custom and brick him. Yhanks for any help
Busybox is not an app.
Also, dont install a rom because there are non for this phone.
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