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Old December 16th, 2011, 05:44 PM   #1 (permalink)
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Default How to: Unroot the Galaxy Nexus, Re-lock the Bootloader and Return to a Factory State

Also Droid-Life posted this up...

How to: Unroot the Galaxy Nexus, Re-lock the Bootloader and Return to a Factory State – Droid Life

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Old December 17th, 2011, 07:02 AM   #2 (permalink)
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This does fit in with the "factory image" thread where you posted it, Rain, but I think it still should have a thread in its own right, so I've used your post as the OP for a new thread here in GNex ATR.


From that linked site, the steps:

Instructions:

1. Download the Android 4.0.2 factory images to your PC. [Download]
2. Unzip the file and its contents into your SDK/Tools folder (wherever your adb.exe and fastboot.exe files are).
*Make sure they are not in their own folder, but have all been extracted to Tools.
3. From within your Tools folder, open a command prompt (SHIFT + right click – “open command prompt here”):
4. Type the following commands, allowing each to finish before moving onto the next:
adb reboot bootloader
fastboot flash bootloader bootloader-toro-primekk15.img
fastboot reboot-bootloader
fastboot flash radio radio-toro-i515.ek02.img
fastboot reboot-bootloader
fastboot flash radio-cdma radio-cdma-toro-i515.ek05.img
fastboot reboot-bootloader
fastboot -w update image-mysid-icl53f.zip
fastboot reboot-bootloader
fastboot oem lock
5. Reboot your phone by highlighting “Start” and pressing the lock switch.
6. It really is as simple as that. Your phone is now back to a 100% stock, unrooted and locked state.
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Old December 17th, 2011, 08:48 AM   #3 (permalink)
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I am not sure these instructions are correct. Someone unrooted in the how to thread and had some issues. I would suggest altering it like this






I am also not sure that radio flashing is needed currently either (yet at least) there are only the stock radios available and I don't see a reason to risk 2 extra bootloader flashes if they aren't needed.
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Old December 17th, 2011, 10:45 AM   #4 (permalink)
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I followed these steps and they worked perfectly. First boot takes a LOOOOOONG time. However I did stop before I re-locked the bootloader as Yeahha states above...
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Old December 17th, 2011, 10:52 AM   #5 (permalink)
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After you ran "fastboot -w update image-mysid-icl53f.zip" did the phone reboot itself or did it stay in the bootloader?
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Old December 17th, 2011, 03:04 PM   #6 (permalink)
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rebooted itself. I did go back into the bootloader though to make sure it still said "unlocked." I have to manually put it into the bootloader because when I ptu the command in to reboot into the boot loader it kept saying "waiting for device" which I assume was because it no longer had root access. either way it worked out and everything was fine.
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Old December 17th, 2011, 03:07 PM   #7 (permalink)
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adb reboot bootloader should reboot it to the bootloader stock as well.

Did you have USB debugging turned on?
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Old December 17th, 2011, 03:13 PM   #8 (permalink)
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yep.
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Old December 17th, 2011, 03:19 PM   #9 (permalink)
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Okay that is odd. Seeing as you have already finished my next step wouldn't work which would be to use "adb devices" to see if your cpu realizes the phone is connected.

Also did you turn on USB debugging after the reboot? (that is what I sould have asked) the last command you did before the reboot would have reset the device in turn removing the USB debugging system option being checked.
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Old December 17th, 2011, 04:19 PM   #10 (permalink)
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For some reason my phone has always (even straight out of the box from VZW) had USB debigging enabled..

Hey how knowledgeable are you about CWM? I'm having trouble with it ob the Gnex. Are you on GTalk?
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Old December 17th, 2011, 04:21 PM   #11 (permalink)
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Guys,

I've just spent the last hour and a half trying to re-flash back to stock...the first three attempts "sort-of" worked...but the "writing 'system'..." part never finished...it just sat there. Tried this with different fastboot programs and finally realized that the USB port I was using was a 3.0 port. When I switched to a USB 2.0 port, things took off:

Code:
c:\gnex\sdk-tools>fastboot -w update image-mysid-icl53f.zip
archive does not contain 'boot.sig'
archive does not contain 'recovery.sig'
archive does not contain 'system.sig'
--------------------------------------------
Bootloader Version...: PRIMEKK15
Baseband Version.....: I515.EK02
Serial Number........: xxxxxxxxxxxxxxxxxxxx
--------------------------------------------
              checking product... OKAY [  0.006s]
   checking version-bootloader... OKAY [  0.003s]
     checking version-baseband... OKAY [  0.000s]
         checking version-cdma... OKAY [  0.016s]
      sending 'boot' (4074 KB)... OKAY [  0.526s]
                writing 'boot'... OKAY [  0.266s]
  sending 'recovery' (4406 KB)... OKAY [  0.561s]
            writing 'recovery'... OKAY [  0.863s]
  sending 'system' (325583 KB)... OKAY [ 40.820s]
              writing 'system'... OKAY [ 36.349s]
            erasing 'userdata'... OKAY [  6.172s]
               erasing 'cache'... OKAY [  0.189s]
                     rebooting...
finished. total time: 85.800s
Now, I only updated the system image and didn't flash the bootloader or radio (they shouldn't have been different and there's no good that can come from tempting fate, eh? ).

Also, what is curious is that ALL of my apps are still there in the app drawer...even the busybox and Superuser apps--of course I am not rooted anymore, but the telltale signs are there.

Okay, I'm off to test rooting via using ClockworkMod custom recovery...

Cheers!
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Old December 17th, 2011, 04:24 PM   #12 (permalink)
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Mine sat at "writing system" for a long long time. I was only using USB 2.0 though...
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Old December 17th, 2011, 06:31 PM   #13 (permalink)
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URGENT!

Guys, I think I made a boo-boo.

I was unrooting/unlocking according to the instructions at DL.

I got to where I finished this step:

fastboot -w update image-mysid-icl53f.zip

It then went into a bootloop with the flying squares. I was not patient and pulled the battery. I am able to boot into recovery and Odin, but my command window on the computer is not recognizing the device.

When I type "adb reboot bootloader", it says:

"error: device not found".

I think it might not be in debugging mode, although it most definitely was until I pulled the battery.

If I start the boot, it doesn't get past the "Google" logo with the unlock symbol, just keeps repeating itself.

Can someone help me please???

Edit:

Guys, I just went ahead and made this a separate thread.
 
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Old December 17th, 2011, 07:00 PM   #14 (permalink)
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I'm not sure about that one. Maybe try booting into recovery and then doing a factory reset?
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Old December 17th, 2011, 07:46 PM   #15 (permalink)
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Default Important note/question

Hey guys, nice find. But I have asked this all over the place and I think it is a very relevant question, especially if one uses this method to return the phone; so I ask it here as well.

P3Droid says that when you boot into bootloader/fastboot mode there is a counter visible on the screen showing how many times the bootloader has been unlocked/locked. Has anyone seen this? And if so, when you go through this method, does the counter in fact reset?

I hope someone takes a look at this as I feel it's an important thing to take note of in this endeavor.
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Old December 17th, 2011, 07:54 PM   #16 (permalink)
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Quote:
Originally Posted by teddyearp View Post
Hey guys, nice find. But I have asked this all over the place and I think it is a very relevant question, especially if one uses this method to return the phone; so I ask it here as well.

P3Droid says that when you boot into bootloader/fastboot mode there is a counter visible on the screen showing how many times the bootloader has been unlocked/locked. Has anyone seen this? And if so, when you go through this method, does the counter in fact reset?

I hope someone takes a look at this as I feel it's an important thing to take note of in this endeavor.
teddyearp,

I just rebooted back in to bootloader (fastboot) mode and do not see any such counter...

Perhaps that was only on P3droid's development device (presuming that's what he has)?

My fastboot screen looks nearly identical to this (this is not my screenshot, by the way):



except that mine says "VARIANT - toro" and different serial numbers, etc. -- but no unlock counter (I actually think I remember reading / hearing about this a long while back, too).

Cheers!
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Old December 17th, 2011, 07:58 PM   #17 (permalink)
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^^^what he said
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Old December 18th, 2011, 10:11 AM   #18 (permalink)
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Thanks, and yeah if that was a screenshot of your device, I'd say ???? not on VZW. P3droid's was a engineering device, now returned.
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Old December 18th, 2011, 03:32 PM   #19 (permalink)
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Ive been reading that the signal issues for many users got much worse after the 4.0.2 update. I dont know bc I accepted the upgrade as soon as it appeared. Im wanting to fo back to stock 4.0.1 just to test my signal and see if its any better. I assume these steps will work with the older factory image, judt substituting the older files in these steps? I want to run a day original locked and stock on the older firmware.

Also, can Odin program be used to flash this instead of adb and fastboot?
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Old December 18th, 2011, 04:37 PM   #20 (permalink)
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Just realized I have a flawed screen and I want to get a replacement so I'm gonna have to lock/unroot it seems.

How do I do this if I followed the "slightly easier manual method" of rooting. I never had to download the SDK or use adb for that so I don't know how that translates to doing the unroot...
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Old December 18th, 2011, 04:41 PM   #21 (permalink)
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you need those in order to do this. I'd recommend doing it...
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Old December 18th, 2011, 05:31 PM   #22 (permalink)
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Quote:
Originally Posted by BringTheRain403 View Post
you need those in order to do this. I'd recommend doing it...
but once I've got the SDK-tools.zip from the "how to root" thread then I can follow the steps on this page?
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Old December 18th, 2011, 05:53 PM   #23 (permalink)
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Quote:
Originally Posted by soy.lor.n View Post
but once I've got the SDK-tools.zip from the "how to root" thread then I can follow the steps on this page?
Yes, since you should have the fastboot utility in from the sdk-tools.zip, that's all you'll need to reflash back to stock using the information Frisco listed in post #2 above.
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Old December 18th, 2011, 05:54 PM   #24 (permalink)
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Quote:
Originally Posted by soy.lor.n View Post
Just realized I have a flawed screen and I want to get a replacement so I'm gonna have to lock/unroot it seems.

How do I do this if I followed the "slightly easier manual method" of rooting. I never had to download the SDK or use adb for that so I don't know how that translates to doing the unroot...
I think you will need to download the SDK and setup ADB to unroot. The instructions linked in the OP, quoted in post 2 and edited by me in post 3 should unroot you (they are all basically the same )

I am not sure what all remnants of root are left behind when you unroot, perhaps SA will chime in with what will need to be removed. I assume you will need to do this via ADB as well.
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Old December 18th, 2011, 08:07 PM   #25 (permalink)
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Default Get back to Stock (Locked bootloader and not Root)

Okay, I dont see a clear method on how to do this on here.

I want to take this phone and not be rooted and lock the bootloader all over again. Then factory reset or whatever as if I was going to take it to Verizon. No traces of anything...

I really want to get back to stock and retry Google Wallet, as I had it working and reset data and its throwing errors at me now.

But I download this:

Stock image for VZW (Verizon) CDMA/LTE "toro/mysid" from Google:

https://dl.google.com/dl/android/aosp/mysid-icl53f-factory-65895fa8.tgz (version 4.0.2)

Then what? Use ODIN? What is that? And what am I checking for the MD5, I know how to find it on astro however what am I looking for?

Need the steps to get back to stock. I can update this post afterwards so everyone else knows how..

Thanks
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Old December 18th, 2011, 08:25 PM   #26 (permalink)
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I would be interested in seeing the specific files and commands for this too.
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Old December 18th, 2011, 08:57 PM   #27 (permalink)
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Is that not what this thread is for?
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Old December 18th, 2011, 09:28 PM   #28 (permalink)
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Yes this...

Thanks, that thread should be STICKIED!!
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Old December 18th, 2011, 09:32 PM   #29 (permalink)
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alright doing it now...

this should be stickied...

Easy as pie....

Thanks!!
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Old December 18th, 2011, 09:46 PM   #30 (permalink)
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Yeahha 2nd post...

it should say

adb reboot bootloader
fasboot oem lock


not adb reboot blootloader
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Old December 18th, 2011, 10:41 PM   #31 (permalink)
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Quote:
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Yeahha 2nd post...

it should say

adb reboot bootloader
fasboot oem lock


not adb reboot blootloader

Thanks! Fixed now
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Old December 18th, 2011, 10:45 PM   #32 (permalink)
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ok...upon looking into this a little more I have a question.

Am I supposed to extract the file containing the image twice? It starts as a tgz, then when I extract it it's a tar, and if I extract THAT I get a folder containing the image-mysid-icl53f.zip plus the other .img files that are needed.

I think maybe I answered my own question.... But if that's not right, someone lemme know please!
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Old December 18th, 2011, 10:47 PM   #33 (permalink)
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Quote:
Originally Posted by civicsisedan View Post
alright doing it now...

this should be stickied...

Easy as pie....

Thanks!!
I added a link in the SA's locked All things root guide to this thread under general guides.
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Old December 18th, 2011, 10:48 PM   #34 (permalink)
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Quote:
Originally Posted by soy.lor.n View Post
ok...upon looking into this a little more I have a question.

Am I supposed to extract the file containing the image twice? It starts as a tgz, then when I extract it it's a tar, and if I extract THAT I get a folder containing the image-mysid-icl53f.zip plus the other .img files that are needed.

I think maybe I answered my own question.... But if that's not right, someone lemme know please!
You are correct, you have to extract twice
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Old December 18th, 2011, 10:59 PM   #35 (permalink)
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OK and one more that's actually a legitimate noob question.

What state is our phone supposed to be in to do this?

Should it be on or off?

Should USB debugging be turned on?

From reading the comments on this page I'm assuming ON and ON?
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Old December 18th, 2011, 11:02 PM   #36 (permalink)
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It should be on (just like when you are ready to make a phone call) and when you run the first command "adb reboot bootloader" it puts it into the bootloader or if you are completely bricked I assume you can just start from the bootloader...
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Old December 19th, 2011, 12:12 AM   #37 (permalink)
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Alright, done and done

THANK YOU guys so much!!
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Old December 19th, 2011, 12:20 AM   #38 (permalink)
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I keep getting an error in bootloader stating cannot load bootloader-toro-primekk15.img

Any help?
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Old December 19th, 2011, 01:17 AM   #39 (permalink)
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Ok...I got that issue figured out. For some reason, even though my paths were correct, it wouldn't work from platform-tools. I extracted the sdk-tools mini folder, placed my files there and ran my commands through that path, and it worked.
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Old December 19th, 2011, 06:53 AM   #40 (permalink)
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Were you using vista or windows 7? Maybe you needed to run it as administrator?
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Old December 19th, 2011, 08:06 AM   #41 (permalink)
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Quote:
Originally Posted by Yeahha View Post
I am not sure these instructions are correct...

...I am also not sure that radio flashing is needed currently either (yet at least) there are only the stock radios available and I don't see a reason to risk 2 extra bootloader flashes if they aren't needed.
Agreed. Its also likely that many users will be accepting OTA updates through Google which will always keep our radio updated. With an unlocked bootloader, its not a worry like it is on many other devices that rely on exploits that may get patched via OTA. Even thinking about roms...we are on the leading edge here with the newest android version. Most roms are going to be based off what we get as stock. So why needlessly flash partitions, especially the radio which is the most apt to cause problems? I think this topic need more discussion. It may just be that we would be best served to throw out what we know...full wipes...and focus on targeted wipes? Idk, I'm still learning here too but I'm finding that fastboot is a powerful tool and moving forward with caution may be beneficial.
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Old December 19th, 2011, 10:01 AM   #42 (permalink)
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Yeahha, are your instructions 100% correct? I have to do that now and return this pos for another.
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Old December 19th, 2011, 10:04 AM   #43 (permalink)
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Bjanow they should be correct. Be aware that there is a possibility unrooting will not remove all traces of root.
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Old December 19th, 2011, 10:05 AM   #44 (permalink)
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Something I'll have to live with I guess. But your instructions are golden, right?
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Old December 19th, 2011, 10:22 AM   #45 (permalink)
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Yeah they should work fine. You may have superuser installed after you unroot.
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Old December 19th, 2011, 10:35 AM   #46 (permalink)
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ok I'll uninstall it then, thanks. Doing a Tib and cwr now, then giving it a go.
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Old December 19th, 2011, 10:35 AM   #47 (permalink)
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Quote:
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Bjanow they should be correct. Be aware that there is a possibility unrooting will not remove all traces of root.
I think we're good now re. this...

I flashed back to stock about 8 times this weekend... For the first 7 times, I kept re-signing back-in during the activation / setup part and saw that my apps had mysteriously reappeared. I was also re-applying the root package via ClockworkMod at times, so I was putting those pieces back manually (and, of course, you can't examine the /data/app directory to see what's there without being rooted--a small catch-22).

I believe this occurred because Android was auto-downloading my apps.

On the last time I flashed back to stock, I skipped the sign-in part and there were no sign of my old apps.

I would just re-lock and unlock the bootloader, flash back to stock (skip the sign-in part of the activation / setup), and finally, re-lock the bootloader one last time before returning.

I also think you can skip re-flashing the radio and bootloader if you haven't changed them...

Cheers!
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Old December 19th, 2011, 11:01 AM   #48 (permalink)
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Done, thanks guys. No trace of superuser afaik. Off the the vzw store now.

Edit: I got a new phone, rerooted, installed cwr, restored my old backup, back to where I was an hour ago. Once again, thanks guys for the great support.
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Old December 19th, 2011, 02:36 PM   #49 (permalink)
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Merged threads



It is in the main sticky the Samsung galaxy Nexus all things root guide.

http://androidforums.com/galaxy-nexus-all-things-root/447119-samsung-galaxy-nexus-all-things-root-guide-updated-12-16-2011-a.html

This is a real good sticky to keep watch of, this is being updated with a lot of good information and is extremely helpful.
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Old December 22nd, 2011, 12:52 PM   #50 (permalink)
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So if I follow the steps in post #3 to unroot, this will allow me to get OTA updates? Then I can root again and be back where I was with but with an update?
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