12B to 10B downgrade possible? - Verizon LG G3

I've tried searching and reading through the various downgrade and upgrade available threads, but can't seem to find anything concrete on the matter. Has anyone confirmed that rollback has OR has not been blocked in the latest OTA - 12B? I'm assuming the tot method wouldn't work since it didn't work with 11C, so I'm most specifically wondering about the kdz method. I'm trying to figure this out for a friend. Thanks!

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ohlin5 said:
I've tried searching and reading through the various downgrade and upgrade available threads, but can't seem to find anything concrete on the matter. Has anyone confirmed that rollback has OR has not been blocked in the latest OTA - 12B? I'm assuming the tot method wouldn't work since it didn't work with 11C, so I'm most specifically wondering about the kdz method. I'm trying to figure this out for a friend. Thanks!
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This topic is of interest to me as I started on 10B and never took any OTA. I rooted, bump'd and started running Beanstown 11C, Cyanogenmod 11, BlissPop 5.0.1 and now SkyDragon 2.0.0. I have seen some report that the .tot method has been met with mixed success for people that took the 11C update but I haven't seen any details. Does the LG Flash Tool have issues laying down the base 10B image when it sees 11C? I would guess if that is the case, the same would be for 12B. Has anyone tried formatting with TWRP etc.?
I have never done the LG Flash Tool with .tot but was always keeping it in my toolbox for when the official Lollipop 5.0.x build comes from Verizon. I would be interested to see why the .tot method fails or the KDZ method for that matter.

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Don't know about 12b (but I think someone else did reply to this question in another forum and stated that yes, you can downgrade back to 10b), but this post says downgrading from 11c possible:
http://forum.xda-developers.com/verizon-lg-g3/general/guide-flash-to-stock-10b-kdz-method-t2928140

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iBolski said:
Don't know about 12b (but I think someone else did reply to this question in another forum and stated that yes, you can downgrade back to 10b), but this post says downgrading from 11c possible:
http://forum.xda-developers.com/verizon-lg-g3/general/guide-flash-to-stock-10b-kdz-method-t2928140
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Yep, I know all about that. I've tot restored 10B a couple different times, and kdz'ed an 11C install back to 10B once, so I'm very familiar with both of those. I'm really curious to know though specifically if anyone has been able to confirm if 12B can be kdz'ed (or tot'ed for that matter, but I doubt it), back to 10B. If a new phone is bought in the next few weeks an comes out of the box with 12B flashed, I need to know whether this I would be stuck as unrootable/unlockable for the time being.

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done.
I did it. Was curious about Advanced Calling so I downgraded since I forgot to make a backup of stock recovery. Got back to stock with no root and no custom recovery. Then I took the OTA updates to 12B. Found out I could not root from there and crossed my fingers and downgraded again. Had a moment of panic as the first attempt failed. Instead of getting a success msg on my computer and a big red number 3 on my phone I had a big red number 2. Restarted the process again and this time it took it. Rooted first this time, then took the updates. Not really interested anymore in custom ROMS and am happy with stock and root. I am curious though if I will be able to install TWRP from here. Haven't tried it.
I'd be careful though and get one more confirmation before you try it. When I said panic, that is really putting it lightly lol

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ohlin5 said:
Yep, I know all about that. I've tot restored 10B a couple different times, and kdz'ed an 11C install back to 10B once, so I'm very familiar with both of those. I'm really curious to know though specifically if anyone has been able to confirm if 12B can be kdz'ed (or tot'ed for that matter, but I doubt it), back to 10B. If a new phone is bought in the next few weeks an comes out of the box with 12B flashed, I need to know whether this I would be stuck as unrootable/unlockable for the time being.
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I can tell you this, I was rooted and the 12B update is on my phone and I'm still rooted. I'm going to try and flash back to 10B to see if it works or not. I'm trying to download the KDZ file, but it keeps aborting. The connection is REAL slow.
I haven't tried the TOT file yet either.

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I used the TOT file myself.

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A couple of things to consider, the tot download is to 10b_3 (the released version) and kzd is to version 10b_1.
The main difference is that 10b_3 Will take OTA updates while 10b_1 Will not.
Sent from my VS985 4G using XDA Free mobile app

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tomlow said:
I used the TOT file myself.
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Awesome! That's what I wanted to know. I'll probably stay on 12b rooted for now then.
---------- Post added at 11:37 AM ---------- Previous post was at 11:36 AM ----------
tomlow said:
I did it. Was curious about Advanced Calling so I downgraded since I forgot to make a backup of stock recovery. Got back to stock with no root and no custom recovery. Then I took the OTA updates to 12B. Found out I could not root from there and crossed my fingers and downgraded again. Had a moment of panic as the first attempt failed. Instead of getting a success msg on my computer and a big red number 3 on my phone I had a big red number 2. Restarted the process again and this time it took it. Rooted first this time, then took the updates. Not really interested anymore in custom ROMS and am happy with stock and root. I am curious though if I will be able to install TWRP from here. Haven't tried it.
I'd be careful though and get one more confirmation before you try it. When I said panic, that is really putting it lightly lol
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Oh, and yes. You can install TWRP. As long as you're rooted, use Flashify to flash it. I can't seem to get to it via the button pushes though, so I installed Quick Boot and use that to boot into recovery, although at this time, I have no use for the recovery except for doing nandroid backups.

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tomlow said:
I used the TOT file myself.
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Thanks a ton for these confirmations....I have to say though, it's very interesting that tot worked for you when so many people had such trouble using the tot when 11C came out. Thanks again though!

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ohlin5 said:
Thanks a ton for these confirmations....I have to say though, it's very interesting that tot worked for you when so many people had such trouble using the tot when 11C came out. Thanks again though!
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I'm just surprised SuperSU survived the OTAs as I thought it wouldn't since the exploit probably does some modification to the system partition. On Motorola phones it usually caused issues.

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I downgraded from 12b using the kdz method. No problems what so ever other than the flash tool crashing at the end.

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cbrehob said:
I downgraded from 12b using the kdz method. No problems what so ever other than the flash tool crashing at the end.
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Interesting....well then I'll ask you another couple off topic questions then, since the only experience I had with the kdz method turned out SUPER sketchy haha. So when I started the flash tool program up and began the process of flashing, I had 2 weird occurrences and want to know if you experienced anything similar. The first weird thing that happened is I never had any confirmation that the software was "seeing" the phone as being connected. I don't have it in front of me as I'm at work, but I recall one screen having boxes in the lower left corner that seemed like they should show something if it were seeing a device connected, but they were completely blank - do you know what screen I'm referring to, and did this happen to you?
And the second thing that happened that about gave me a heart attack (since it was on a friend's phone hahaha), was that when I couldn't get those boxes described above to populate and give me any indication/confirmation that the software was actually "seeing" anything, I just bit the bullet and decided to hit next, at which point the flash tool took off and began flashing, but both the flash tool program itself, and the dialogue boxes that popped up during the process were completely full of question marks.....nothing at all readable. Did you also experience anything like this?
Just figured I'd ask as since I did this to a friend's phone a month or so ago, it's always bugged me as to why it occurred, and so I've been very hesitant to ever use it again should I have to, so I at least wanted to see if I was in the minority on these experiences haha Thanks in advance!

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ohlin5 said:
Interesting....well then I'll ask you another couple off topic questions then, since the only experience I had with the kdz method turned out SUPER sketchy haha. So when I started the flash tool program up and began the process of flashing, I had 2 weird occurrences and want to know if you experienced anything similar. The first weird thing that happened is I never had any confirmation that the software was "seeing" the phone as being connected. I don't have it in front of me as I'm at work, but I recall one screen having boxes in the lower left corner that seemed like they should show something if it were seeing a device connected, but they were completely blank - do you know what screen km referring to, and did this happen to you?
And the second thing that happened that about gave me a heart attack (since it was one friend's phone hahaha), was that when I couldn't get those boxes described above to populate and give me an indication/confirmation that the software was "seeing" anything, I just bit the bullet and decided to hit at which point the flash tool took off and began flashing, but both the flash tool program itself, and the dialogue boxes that popped up were completely full of question marks.....nothing at all readable. Did you also experience anything like this?
Just figured I'd ask as since I did this to a friend's phone a month or so ago, it's always bugged me as to why it occurred, and I've been hesitant to ever use it again should I have to, so I am least wanted to see if I was in the minority haha Thanks in advance!
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Yah, it was sketch. I did see all the ?????? all over the screen but I trusted the directions on the thread.
As far as the software seeing the device, the only indication that I had was the program showing the available memory on the device, so I knew it was reading it.
I did it once, it worked, I'm not really a seasoned flasher. I just got my G3 last week and I had OTAd before rooting and unlocking.

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cbrehob said:
Yah, it was sketch. I did see all the ?????? all over the screen but I trusted the directions on the thread.
As far as the software seeing the device, the only indication that I had was the program showing the available memory on the device, so I knew it was reading it.
I did it once, it worked, I'm not really a seasoned flasher. I just got my G3 last week and I had OTAd before rooting and unlocking.
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Lol well I appreciate your confirmation that I'm not the only one who felt the sketchiness. I never noticed the available memory as being shown, but maybe I overlooked that. And I'm a pretty seasoned flasher, at least as far as custom rom flashing goes, but yeah that process definitely grew a little hair on my knuckles lol. Thanks again!

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is 12B even worth upgrading to?
I have been reading alot about the update to 11 and 12B. is it really worth it to upgrade?...I got my phone it had 10B out of the box (I think) and phone immediately said there was an update as I was on my way home from the verizon store, so I thought sure and did the update, got home and started looking into root and realized I had to downgrade to 10 to get root, did it KTZ method, rooted, installed TWRP so I can make backups, and here I am ever since, as far as I can tell from reading is the only thing 12B gives you is advanced calling or whatever it is, I dont really care if I have that, I dont really even care if I have that unless someone can chime in and tell me whats its all about, is it worth upgrading and risking loosing root and stuff just for this advanced calling feature?...what is it and what does it do?

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This is VoLTE or Voice over LTE. Someone will correct me if I'm wrong, but it doesn't do anything on the G3 other than allow your voice conversations to travel over the LTE line. This update was required for the Turbo, Sony, and other new phones that could not talk and surf at the same time. The G3 never had that problem.

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nice tips, i was at 10b and rooted. i just couldnt take the annoying update available pop up anymore.
so i unrooted, udpated to 12b, then realized i cant root 12b. i just re flashed back to 10b.
my questions:
1) do i root 10b then upgrade to 11c? if so how, this was my original version and my problem was it always failed to update?
2) do i upgrade to 11c first, then root? if so how, i cant find directions to root 11c?
3) once rooted at 11c, how to i upgrade to 12b while keeping the root?
only reason i root is for wifi tethering on a unlimited verizon plan, if there is another way to be updated and have tethering, please share.
thank you.
i am a newbie at rooting, so specific links/steps are appreciated.

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Yes. I went from 12 to 10,just follow the instructions.

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jadams161 said:
Yes. I went from 12 to 10,just follow the instructions.
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im not sure if you are trying answering my questions or not. if you are, i am rooted at 10b again. how do i keep my root but update to at least 11c, but preferably 12b?
update, i found a temp solution in another thread thanks to user Wildcat2083 :
I found a useful trick to keep the ota from showing up, if you enter ##3328873 in tge dialer pad and enter 000000 for the service code you then can uncheck the ota-dm mode this should prevent any ota
this at least gets rid of the update pop up. but i would still like to know how to upgrade to 12b well keeping my root.