[GUIDE] Unroot for OTA using LG PC Suite (PC Only)

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Lennyuk

Inactive Recognized Developer
Jan 26, 2010
6,273
1,743
Essex, England
www.villainrom.co.uk
This guide is for use on rooted stock roms to restore the phone to a position where it will accept OTA updates.

Please note the following:

1. It does not wipe the /data/ partition of your device.
2. It will reinstall any bloat you have uninstalled including those apps that you carrier put into /data/
3. It will remove any files you have added to /system/ including root or other modifications
4. Any files you have "frozen" will stay disabled, you cannot unfreeze them without rooting again - this guide will be for a "full unroot" so there is an optional step below to unfreeze apps.


The Guide

1. Download LG PC Suite from LG's website - you must select model type before you do so, but as far as I can tell it downloads the same version regardless.

2. Update the app so it recognises the G3 - this should ask you to update automatically on opening the app, if not you can do it from the "help" menu.

(NB: if you have used some of the KDZ flashing methods on here you may have issues updating as your hosts file is probably altered to block the PC Suite gaining a connection).

3. Connect the phone via USB (the app allows for a wifi connection but this is very restrictive, you require a USB connection for this).

*OPTIONAL STEP* If you want to go back to a truly stock experience then unfreeze any apps you have frozen (I am unsure if having apps frozen will effect OTA installations, it should still work fine, in theory).

4. With the device connected go to the "phone" menu in PC Suite and select the option that says "Restore Upgrade Errors".

5. It will then scan your device, download the rom and begin flashing, this is all automatic without any further input from you, do not cancel it.

6. The phone will reboot when finished. You are now unrooted and unmodified and OTA's should work.

*OPTIONAL STEP* If you want to go back to 100% stock then its probably a good idea to factory reset your phone at this point - this will wipe your whole device (of course).

And there you have it, your quick(ish), painless method for being able to unroot to accept OTA's without requiring a wipe.
 
Last edited:

Tarzan-

Senior Member
Mar 22, 2012
330
110
Melbourne
Strange. Every time I click on restore errors it hangs for 30 secs and then LGpcsuite exe stopped working message and it stops. Any ideas ? I'm using windows 7 64bit and all drivers installed, pc recognizes phone.
 

Lennyuk

Inactive Recognized Developer
Jan 26, 2010
6,273
1,743
Essex, England
www.villainrom.co.uk
Strange. Every time I click on restore errors it hangs for 30 secs and then LGpcsuite exe stopped working message and it stops. Any ideas ? I'm using windows 7 64bit and all drivers installed, pc recognizes phone.

Could be a conflict with something else - to get it working for me I had to delete all traces of LG from the pc - all LG apps, drivers (including using USBDeview) and start over.
 

medicus07

Senior Member
Feb 6, 2012
110
28
Neustadt, Germany
First of all, thank you for your detailed tutorial. Yesterday I have had the same idea... can someone confirm this theory... though there is no update for international version yet, someone with the korean model?
 

Lennyuk

Inactive Recognized Developer
Jan 26, 2010
6,273
1,743
Essex, England
www.villainrom.co.uk
First of all, thank you for your detailed tutorial. Yesterday I have had the same idea... can someone confirm this theory... though there is no update for international version yet, someone with the korean model?

I tested this theory yesterday, albeit without an OTA - it does replace all modified and removed files in /system/ as well as removing any files you have added such as root or xposed.

There is no reason for the phone to continue to report that it has been modified, certainly if you take my final optional step and couple this restore with a factory reset.
 

Tarzan-

Senior Member
Mar 22, 2012
330
110
Melbourne
I tested this theory yesterday, albeit without an OTA - it does replace all modified and removed files in /system/ as well as removing any files you have added such as root or xposed.

There is no reason for the phone to continue to report that it has been modified, certainly if you take my final optional step and couple this restore with a factory reset.

Ok I fixed my issue, PC suite crashing by running it as admin on windows. When I run to "fix errors" it says I'm running latest version. When I check OTA on my phone there is an update which obviously don't run after download because I'm rooted. I'm out of ideas :confused:
 
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Lennyuk

Inactive Recognized Developer
Jan 26, 2010
6,273
1,743
Essex, England
www.villainrom.co.uk
Ok I fixed my issue, PC suite crashing by running it as admin on windows. When I run to "fix errors" it says I'm running latest version. When I check OTA on my phone there is an update which obviously don't run after download because I'm rooted. I'm out of ideas :confused:

fixing errors is a reflash to fix a problem, it shouldn't matter what version your on, are you sure you didn't click the check for updates button by error?
 

medicus07

Senior Member
Feb 6, 2012
110
28
Neustadt, Germany
Ok I fixed my issue, PC suite crashing by running it as admin on windows. When I run to "fix errors" it says I'm running latest version. When I check OTA on my phone there is an update which obviously don't run after download because I'm rooted. I'm out of ideas :confused:

You should't have root access after using the fix upgrade function...
 

Tarzan-

Senior Member
Mar 22, 2012
330
110
Melbourne
You should't have root access after using the fix upgrade function...

No, before fix upgrade. Actually I never get to download the firmware.

fixing errors is a reflash to fix a problem, it shouldn't matter what version your on, are you sure you didn't click the check for updates button by error?

As I said I never get this option. It keeps on saying you have the latest version and that is it.
 

Tarzan-

Senior Member
Mar 22, 2012
330
110
Melbourne
Can you screenshot the "phone" menu you are seeing on LG PC Suite and upload it here?

Attached both, before running and after running.
 

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  • 73
    This guide is for use on rooted stock roms to restore the phone to a position where it will accept OTA updates.

    Please note the following:

    1. It does not wipe the /data/ partition of your device.
    2. It will reinstall any bloat you have uninstalled including those apps that you carrier put into /data/
    3. It will remove any files you have added to /system/ including root or other modifications
    4. Any files you have "frozen" will stay disabled, you cannot unfreeze them without rooting again - this guide will be for a "full unroot" so there is an optional step below to unfreeze apps.


    The Guide

    1. Download LG PC Suite from LG's website - you must select model type before you do so, but as far as I can tell it downloads the same version regardless.

    2. Update the app so it recognises the G3 - this should ask you to update automatically on opening the app, if not you can do it from the "help" menu.

    (NB: if you have used some of the KDZ flashing methods on here you may have issues updating as your hosts file is probably altered to block the PC Suite gaining a connection).

    3. Connect the phone via USB (the app allows for a wifi connection but this is very restrictive, you require a USB connection for this).

    *OPTIONAL STEP* If you want to go back to a truly stock experience then unfreeze any apps you have frozen (I am unsure if having apps frozen will effect OTA installations, it should still work fine, in theory).

    4. With the device connected go to the "phone" menu in PC Suite and select the option that says "Restore Upgrade Errors".

    5. It will then scan your device, download the rom and begin flashing, this is all automatic without any further input from you, do not cancel it.

    6. The phone will reboot when finished. You are now unrooted and unmodified and OTA's should work.

    *OPTIONAL STEP* If you want to go back to 100% stock then its probably a good idea to factory reset your phone at this point - this will wipe your whole device (of course).

    And there you have it, your quick(ish), painless method for being able to unroot to accept OTA's without requiring a wipe.
    2
    LG flash tool.

    Worked perfectly. Thank you for replying.
    1
    I tested this theory yesterday, albeit without an OTA - it does replace all modified and removed files in /system/ as well as removing any files you have added such as root or xposed.

    There is no reason for the phone to continue to report that it has been modified, certainly if you take my final optional step and couple this restore with a factory reset.

    Ok I fixed my issue, PC suite crashing by running it as admin on windows. When I run to "fix errors" it says I'm running latest version. When I check OTA on my phone there is an update which obviously don't run after download because I'm rooted. I'm out of ideas :confused:
    1
    Thanks for this. Been holding off on root until a proper method was posted. I have the 3UK D855 model so hopefully should have no issues
    1
    I can't get my Verizon G3 to connect to PC Suite either. Tried on 2 different PCs too.

    I did the update to the newest version. I installed the Verizon unified drivers that I got in the ioroot thread and also tried the drivers that can be downloaded through PC Suite. I also can't connect via wifi.

    Any other way to get back to stock as it looks like I need to swap my phone as it's defective.

    LG flash tool.
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