Bootloader flash back - Milestone XT720 Android Development

Could we any way flash back bootloader to when it was not locked with a pach.
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mchlbenner said:
Could we any way flash back bootloader to when it was not locked with a pach.
Sent from my Milestone XT720 using XDA Premium App
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I'm not sure I understand entirely what you're asking, but from what I've read you would need a bootloader that was not locked and had been signed with a key that your current bootloader will accept. Do you have one?

I think he means the following:
IF our bootloader wasn't locked and he would flash a custom ROM but wanted to return to the stock one, if he can flash his stock bootloader back to prevent bricks in the future.

Related

[Q] Relook BootLoader

I try software from 10X forums :
http://forum.xda-developers.com/showthread.php?p=17494360
and its wrote there is nothing to restore.
what i can do ?
Is this what you were looking for?
[Tutorial] Relock bootloader!
i try it and now its doesn't boot up!!!
what i can do ?
I had that problem when I was using a custom kernel. Had to flash back to a stock kernel before I could re-lock the bootloader
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[Q] re-block the unlocker

On the atrix I don't want it unlocked anymore the bootloader so how can it be locked again?
It can't, once unlocked always unlocked. Only thing you can do is flash an sbf to "hide" the unlock text but that is not recommended.
sillyshyme said:
On the atrix I don't want it unlocked anymore the bootloader so how can it be locked again?
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Did you ask in the pudding thread? I'm pretty sure all this is covered there.
Sent from my MB860 using xda premium
I believe a fuse is burned once you unlock the bootloader and the process is irreversible. Sorry
Running MIUI Alpha
WuchuHurD said:
I believe a fuse is burned once you unlock the bootloader and the process is irreversible. Sorry
Running MIUI Alpha
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YEP YOU ARE 1000000000010001000%
correct witch also kinda looks like the numbers in that particular fuse witch
is burnt
and Dont try to flash back to 1.8.3
eather or you will something like this
failed to boot
0001
witch translates to a hard brick
Sent from my MB860 using Tapatalk
I had to return my atrix to warenty due to the digitizer. I just pluged my atrix up an ran the software updter from motos website. It remov3d the unlock from my device. It is actually simple to do
Sent from my Transformer TF101 using Tapatalk
I did the same thing this week and sent my phone back to att for a warranty replacement.
That doesn't actually "relock" the device. It just removes the unlocked sign at boot.
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Downgrade to 4.1.2 possible for nonrooted ?

Hi everyone I was just wondering if its possible to downgrade my nexus from 4.2.1 to 4.1.2 if I'm not rooted. I'm currently not interested in rooting my device so is there a way to do it without rooting/unlocking?
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Bump
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Follow this http://m.pocketnow.com/2013/01/29/how-to-flash-nexus-to-stock
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desiresiscool said:
Follow this http://m.pocketnow.com/2013/01/29/how-to-flash-nexus-to-stock
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I can't flash things because I'm unrooted. So I don't think this method will work. Correct me if I'm wrong.
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Anyone know?
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I do not know for sure but I quite doubt it.
I am curious as to why you want to though. Not that there's anything wrong with wanting to downgrade, of course.
Have you tried one the took kits available? Check around in the Nexus 7 original development section. Look for Wuggs.
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Droid117 said:
Have you tried one the took kits available? Check around in the Nexus 7 original development section. Look for Wuggs.
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I looked at his toolkit but it basically says that I have to root in order to even use the toolkit so is there a way to downgrade without having to go through that rooting process? For now, I don't want to root my nexus
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Don't try to root it you'll only manage unlocking the boot loader then when you try and root it it will get stuck in fast boot mode I tried about every rooting program but it could be because my Comp is running windows xp lol
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served24 said:
I looked at his toolkit but it basically says that I have to root in order to even use the toolkit so is there a way to downgrade without having to go through that rooting process? For now, I don't want to root my nexus
Sent from my Nexus 7 using xda app-developers app
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It's so easy to just reflash stock and relock the bootloader that you really have nothing to worry about. If you want unrooted stock 4.1.2 just unlock the bootloader, then flash the stock image of 4.1.2, then relock the bootloader after. It's a really simple process.
dstryrwiz said:
It's so easy to just reflash stock and relock the bootloader that you really have nothing to worry about. If you want unrooted stock 4.1.2 just unlock the bootloader, then flash the stock image of 4.1.2, then relock the bootloader after. It's a really simple process.
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Doesn't this void the warranty though? I know it did when i rooted my phone.
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Is this even possible or should I stop furthering this question?
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served24 said:
Doesn't this void the warranty though? I know it did when i rooted my phone.
Sent from my Nexus 7 using xda app-developers app
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If i'm not mistaken, as long as you flash back to 4.2.1(which is the os it came with when u got it out of the box), and then re-lock the bootloader, unroot, then your warranty wont be voided mate. hope I helped.
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JohnMacky said:
If i'm not mistaken, as long as you flash back to 4.2.1(which is the os it came with when u got it out of the box), and then re-lock the bootloader, unroot, then your warranty wont be voided mate. hope I helped.
Sent from my MB860 using xda app-developers app
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Yeah, I've done this plenty of times with my Nexus 7 and even the Verizon Galaxy Nexus. As long as you're on a stock image with a locked bootloader, they won't give you any trouble or claim you voided your warranty, as there's really no way to tell. I've gotten into the habit of unlocking and rooting my device as soon as I get it, and if I find a problem I just revert back to a stock image, relock the bootloader, then send it back in. I have yet to have a single issue.
dstryrwiz said:
Yeah, I've done this plenty of times with my Nexus 7 and even the Verizon Galaxy Nexus. As long as you're on a stock image with a locked bootloader, they won't give you any trouble or claim you voided your warranty, as there's really no way to tell. I've gotten into the habit of unlocking and rooting my device as soon as I get it, and if I find a problem I just revert back to a stock image, relock the bootloader, then send it back in. I have yet to have a single issue.
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How do you save your stock image?
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served24 said:
How do you save your stock image?
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You don't need to worry about saving your stock image. The person above you is talking about saving the stock image to return to after flashing a custom ROM.
There is no way to revert back to 4.1.2 without root access. Doing a factory reset, about the only thing you can do without root, will only return you back to stock 4.2.1
My advice just stay on 4.2.1 whatever your issue is with it.
Otherwise use a toolkit. You will need a PC and the 4.1.2 image. Wugfresh has a website. I would start there.
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ezas said:
You don't need to worry about saving your stock image. The person above you is talking about saving the stock image to return to after flashing a custom ROM.
There is no way to revert back to 4.1.2 without root access. Doing a factory reset, about the only thing you can do without root, will only return you back to stock 4.2.1
My advice just stay on 4.2.1 whatever your issue is with it.
Otherwise use a toolkit. You will need a PC and the 4.1.2 image. Wugfresh has a website. I would start there.
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I actually was just referring to the stock images you can get directly from Google or from goo.im. It's easy enough to just use the 4.2.1 stock image from Google to just restore back to how it shipped, and then relock the bootloader.
served24 said:
Hi everyone I was just wondering if its possible to downgrade my nexus from 4.2.1 to 4.1.2 if I'm not rooted. I'm currently not interested in rooting my device so is there a way to do it without rooting/unlocking?
Sent from my Nexus 7 using xda app-developers app
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Click to collapse
dstryrwiz said:
It's so easy to just reflash stock and relock the bootloader that you really have nothing to worry about. If you want unrooted stock 4.1.2 just unlock the bootloader, then flash the stock image of 4.1.2, then relock the bootloader after. It's a really simple process.
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Completely agree with this... I have, on several occasions, reflashed stock, switching between 4.1.2 and 4.2.1 - (for me, it was more of an exercise in learning about fastboot and adb... and making sure I had TRIED AND TESTED factory images on my laptop as contingencies should anything go wrong when I came to start flashing custom ROMs).
-----
You don't need root to flash a factory image... everything is done with fastboot; with the Nexus 7 in FASTBOOT/BOOTLOADER mode (from complete shutdown, press and hold Volume Down button... whilst holding, press the Power Button).
(Root is meaningless anyway, here in FASTBOOT/BOOTLOADER mode, since /dev/block/mmcblk0p3, the SYSTEM partition, hasn't even been mounted yet - so no SU binary available... whether or not it exists, it's sort of irrelevant).
- here, for example, is the flash-all script from 4.1.2 (nakasi-jzo54k)... (Nexus 7, WiFi model only).
Code:
fastboot erase boot
fastboot erase cache
fastboot erase recovery
fastboot erase system
fastboot erase userdata
fastboot flash bootloader bootloader-grouper-3.41.img
fastboot reboot bootloader
sleep 10
fastboot -w update image-nakasi-jzo54k.zip
After running this script (flash-all.bat if in Windows, or flash-all.sh if an Apple user) you can optionally choose to lock the bootloader with... (if you're concerned about warranty issues).
Code:
fastboot oem lock
-----
If it was the case you needed root to run...
Code:
fastboot flash [partition to be flashed] [IMG file to flash]
...you wouldn't be able to flash a CUSTOM RECOVERY like CWM or TWRP... and thus, you wouldn't be able to flash Chainfire's UPDATE-SuperSU-v1.00.zip (http://download.chainfire.eu/310/SuperSU/UPDATE-SuperSU-v1.04.zip) in order to gain root in the first place!... (you see the paradox!).
Rgrds,
Ged.

CWM with locked bootloader?

Hey guys,
I just bought the nexus 4 from a guy and its working awesome. The only "problem" I have is that the guy before me was playing around with the nexus. And now I have a locked bootloader, no SU binaries/root but CWM?? Is it possible to have CWM with a locked bootloader?
Anyways, i dont want to play around with it because the original store that sold this nexus will blame me for playing around with it if something actually happens.
So can i update it to key lime pie when it comes out without any problems?? Or can i remove CWM without unlocking the bootloader(i have alot of apps)?
Thanks
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You can flash a ROM and then relock the bootloader. Just unlock it and start again
Nevermind
EddyOS said:
You can flash a ROM and then relock the bootloader. Just unlock it and start again
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Can i update it without removing the nonfunctional recovery?
Sent from my Nexus 4 using xda app-developers app
It's better to go back to 100% stock so you know exactly what's been done
You can always use this if you're rooted. https://play.google.com/store/apps/details?id=net.segv11.bootunlocker
Sent from my Nexus 4 using Tapatalk 4 Beta

[Q] Xt907 Locked Bootloader, Possible to install Cyanogenmod or Roms with Safestrape?

As the title says, I am wondering if I can install the current Cyanogenmod (file: cm-10.1.3-xt907.zip) with Safestrape/TWRP. My system version is 98.15.66.XT907.Verizon.en.US, baseband: SM_BP_101031.027.32.81P. I am aware that I have the OTA update that locked my bootloader, nulling the use of motopocalypse.
I did try flashing a Cyanogenmod build to Slot 2 of my recovery which ended up softbricking my phone. I might have messed up something during the flashing, or perhaps didn't change a certain setting.
The Safestrape version I have and used is 3.11, the latest build for my device is 3.12. Would 3.12 be any better when flashing Cyanogenmod?
Any help would be appreciated.
.66 was the OTA prior to the one that locked the bootloader. .78 locked the BL. Try to see if you can unlock.
System version 98.30.1 XT907 Does anyone know if my version is unlock able or not?
Briteyez83 said:
System version 98.30.1 XT907 Does anyone know if my version is unlock able or not?
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No.. I'm sorry you can't unlock that version..
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ezknives said:
No.. I'm sorry you can't unlock that version..
Sent from my XT907 using xda app-developers app
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Damn, ok. Thank you
Thanks, but the question remains. Is it possible to install CyanogenMod or other Roms with Safestrape/TWRP? I tried flashing it once again, but after I select reboot phone, it remains black. I have to do a hard reset on my phone to get it to recovery to restore the stock.
Garret27 said:
Thanks, but the question remains. Is it possible to install CyanogenMod or other Roms with Safestrape/TWRP? I tried flashing it once again, but after I select reboot phone, it remains black. I have to do a hard reset on my phone to get it to recovery to restore the stock.
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TWRP is for those of us with an unlocked boot loader... You can use safestrap sure... Not to many roms for it most all is stock/stock based... There is a old cm ROM you can flash in safe strap but it's an older one and I think the camera was broken... There is topics all over here about what you can do with a locked boot loader... Have you tried to unlock it yet...
Sent from my XT907 using xda app-developers app
lol, I had to get a Electrify M because of the bootloader. Damn you Motorola/Verizon.
Thanks for your posts and knowledge!
BL
ezknives said:
No.. I'm sorry you can't unlock that version..
Sent from my XT907 using xda app-developers app
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cual es la version que se puede por favor

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