Unrooting is not enough

tawright915

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So I rooted my phone via the post on how to root your phone and install recovery menu without using a computer. After that I made my backup and booted to the latest version of Thunderom.

Now that the update is coming down the line, I restored my original stock image and rebooted. Then I unrooted. However when I run the system update it seems like it's still seeing the Thunderom image. So can we get complete steps to setting the phone back to stock even at the recovery menu level?

Thanks
 

tawright915

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This thread has the steps to flash back to stock

How to Return to Stock

Yeah I went through this sticky. The problem is I rooted my phone without a computer so now I need a PC to get it back to stock? And I need to download some kernal when I never updated the kernal to begin with?

I have to admit I am throughly confused.
If I rooted my phone with out a PC how do I unroot my phone without a PC?

Thanks
Tom
 

MaXXimus

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I could be wrong, since I'm fairly new at this, but I don't think you can get completely back to stock without a computer if you have flashed a custom ROM. You'll need to follow the guide on how to get back to stock. I don't know of any other way.
 

tawright915

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I could be wrong, since I'm fairly new at this, but I don't think you can get completely back to stock without a computer if you have flashed a custom ROM. You'll need to follow the guide on how to get back to stock. I don't know of any other way.

Okay now that is informational. So does the custom ROM also update the kernal? I do not remember what my phone had before I put thunderom on it.

Does Thunderom 1.6.X change the kernal?

If not then all I need to do is download the Flash_Image.zip...right?

And what about the scripts we ran in the termserver? What is the reverse of that?

Thanks
 

sfhub

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The unroot procedure basically does this
1) restore the V8 NANDROID backup
2) restore the V9 Recovery partition
3) run the V8->V9 update.zip

Everything else is setup work to make those steps possible.

You can probably do it without a computer but you'll need to work out the steps yourself and anytime you try something others haven't worked out for you, there are higher chances for things to go wrong.
 

junkshow

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Yeah I went through this sticky. The problem is I rooted my phone without a computer so now I need a PC to get it back to stock?

It is the easiest and safest way to do it, but you might be able to get back to stock without the PC. However, I do not think you can update to ZVC (at this time) without a PC.

And I need to download some kernal when I never updated the kernal to begin with?

Pretty much every ROM you ever flash will have a kernEl. That is what defines how the ROM talks to the hardware. So, yeah, you did update the kernel.

I have to admit I am throughly confused.
If I rooted my phone with out a PC how do I unroot my phone without a PC?

If you are only interested in unrooting your phone, you can do it without a PC. However, even after unrooting and returning to stock V9, the VC OTA update doesn't work. To get that you MUST use the PC update (at this time, that may change in the future if someone posts an update.zip that works with stock recovery).

To unroot without a computer, you'll need to do everything described in the unrooting thread, but use the terminal emulator application on your phone to enter the commands instead of adb. This will be a giant pain in the @$$, and there will be much more opportunity to fubar your phone, so I recommend against it.
 

gk1984

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The main problem why LG's (or other manufacturer updates) won't work once you root and start playing with roms and such is the custom recovery. Once you install a custom recovery, only custom roms or "updates" will work. You would have to replace the custom recovery in order to accept those updates. Now, I'm not saying that's the only thing you have to do. Follow that thread provided above. But there's more to it than just restoring your stock nand backup and unrooting. Restoring the stock backup would undo all of the rom(s) you have flashed, but does not undo the custom recovery.
 

shortyjacobs

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The unroot procedure basically does this
1) restore the V8 NANDROID backup
2) restore the V9 Recovery partition
3) run the V8->V9 update.zip

Everything else is setup work to make those steps possible.

You can probably do it without a computer but you'll need to work out the steps yourself and anytime you try something others haven't worked out for you, there are higher chances for things to go wrong.

From what I understand, (and that's very little), the problem is restoring the V9 Recovery after restoring the V8 NANDROID backup. The standard method of flashing a recovery is through a root shell. You can do this without a computer if you have root access and a terminal emulator on your phone, no biggie.

BUT, if you restore the V8 NANDROID backup, you loose root, so upon rebooting the phone, you can't flash the V9 Recovery. If you decide to be sneaky and flash the V9 recovery first, then when you reboot into the (now stock) recovery, there will be no option to restore a NANDROID backup.

It's a chicken-and-egg problem.

The "unroot" thread has you restore V8 NANDROID backup, then (using a computer, while still in the Rooted Custom recovery), flash the V9 recovery. You effectively do both steps at once, getting you around the catch-22 above.

I'm no smartie...I'm guessing someone might be able to make a flashable zip that could flash the recovery from IN the recovery? So, you reboot into custom recovery, restore V8 NANDROID, flash V9 Stock Recovery, and do the whole damn thing on your phone...but AFAIK that's not an option right now.
 

sfhub

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BUT, if you restore the V8 NANDROID backup, you loose root, so upon rebooting the phone, you can't flash the V9 Recovery.
After doing the NANDROID V8 restore, just download z4root and install it. That will give you root back and you can restore the V9 recovery image from your terminal on the phone.

To see how to download z4root and install it, just look at the "How to root without a PC" thread:
http://forum.androidcentral.com/lg-...t-recovery-rom-without-touching-computer.html
 

tawright915

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You apparently havent read any of the the threads here or you wouldnt be starting a whole new post asking this question.

Guys thanks for clearing that up. I don't think it was ever mentioned that you are essentially flashing a different kernal too...which is confusing when you try and go back.

And JMB1317....whaaaaa. Thanks for your informatvie contribution to this thread. ..........not!

Okay so one last question just so and I am clear and for any noobs that may be lurking.....if I want to apply the new update and I've just restored from my backup and unrooted....I'll need to do it from a PC using LG support tool?

Thanks...and JMB you don't need to answer.
 

sfhub

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Okay so one last question just so and I am clear and for any noobs that may be lurking.....if I want to apply the new update and I've just restored from my backup and unrooted....I'll need to do it from a PC using LG support tool?
If you install the VC Update using the LG Software Updater tool, you'll have the VC OS/Radio + preserve the ability to root.

If you install the VC Update via OTA, then you have the VC OS/Radio and lose the ability to root.
 

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