Database Users

Can't unlock bootloader on my Nexus 7

I'm trying to unlock bootloader.
After command "fastboot oem unlock", I get the error:
Code:
(bootloader) erasing userdata...
(bootloader) erasing userdata done
(bootloader) erasing cache...
(bootloader) erasing cache done
(bootloader) unlocking...
FAILED (remote: (unknown error code))
finished. total time: 7.981s
Drivers installed. Device is new. Bought yesterday.
How to solve this problem? Thanks in advance.

What bootloader version?
Try this:
- Power off
- Power on into bootloader/fastboot mode
- on the PC: fastboot reboot-bootloader
- now try again
this usually fixes those kinds of problems for me.

HellcatDroid said:
What bootloader version?
Try this:
- Power off
- Power on into bootloader/fastboot mode
- on the PC: fastboot reboot-bootloader
- now try again
this usually fixes those kinds of problems for me.
Click to expand...
Click to collapse
Bootloader version 3.34.
fastboot reboot-bootloader did not help(( displays the same error.

I haven a friend with a new N7 delivered with 4.1.2 on that same bootloader, 3.34. He cannot update to 4.2 OTA. I even tried to sideload it for him with no luck. All I can deduce from this is that that JB version should not exist with that version of bootloader. Something seems borked.
Sent from my MB860 using xda app-developers app

How to enable debugging mode in fastboot or recovery mode? I think, that I cant unlock bootloader because debugging mode turned off. I cant turn on my device, it hangs on boot animation(like letter X).
Yesterday I download file via uTorrent. My device freezes. I turned him off. And he refused to boot(hanging on boot animation).

I've booted my device in APX mode.. How to flash bootloader on my device with NvFlash?

Edited
Sent from my SPH-D710 using Tapatalk 2

Try updating the bootloader and then trying to unlock.
Sent from my Nexus 7

Chillwood said:
How to enable debugging mode in fastboot or recovery mode? I think, that I cant unlock bootloader because debugging mode turned off. I cant turn on my device, it hangs on boot animation(like letter X).
Click to expand...
Click to collapse
Go to recovery and try a fctory reset/wipe.
Chillwood said:
I've booted my device in APX mode.. How to flash bootloader on my device with NvFlash?
Click to expand...
Click to collapse
No way to do that so far.

HellcatDroid said:
Go to recovery and try a fctory reset/wipe.
Click to expand...
Click to collapse
When I go into recovery, all I see - this is the android icon with a red exclamation mark. Nothing more..

Chillwood said:
When I go into recovery, all I see - this is the android icon with a red exclamation mark. Nothing more..
Click to expand...
Click to collapse
Hold VolumeUp and press the Power button - or something like that - and the menu will show up.

HellcatDroid said:
Hold VolumeUp and press the Power button - or something like that - and the menu will show up.
Click to expand...
Click to collapse
By this combination I go in APX mode...

I meant while the android with the red "!" shows, not while powering on.

When I'm using this combination when red !, apx mode is loading too.

Chillwood said:
When I'm using this combination when red !, apx mode is loading too.
Click to expand...
Click to collapse
Are you forgetting to release the buttons again, maybe?

HellcatDroid said:
Are you forgetting to release the buttons again, maybe?
Click to expand...
Click to collapse
Sorry for my english, I don't ynderstand you.
I did so:
Connected my device to PC.
Booted into fastboot by pressing all keys.
Selected recovery mode. Displayed "android with !".
I holded "volume up" and "power" button for 15 seconds. And then apx mode booted

Don't hold the buttons like forever.
Press them and release them again, also try some other combinations if that one doesn't work.
If you keep torturing the powerbutton, of course the device eventually reboots.
Be creative.
Use common sense.

HellcatDroid said:
Don't hold the buttons like forever.
Press them and release them again, also try some other combinations if that one doesn't work.
If you keep torturing the powerbutton, of course the device eventually reboots.
Be creative.
Use common sense.
Click to expand...
Click to collapse
Thanks... but when I'm using "wipe data/factory reset" - my device freezes, and when I restart him there is no changes, and I also can not unlock my bootloader.

I think that to unlock bootloader needs debugging mode. In recovery mode there is menu item "apply update from ADB". So I can enable adb. How to unlock bootloader or flash by this way?

veeman said:
Try updating the bootloader and then trying to unlock.
Sent from my Nexus 7
Click to expand...
Click to collapse
I can't update him, because he is locked.

[Q] Nexus 7 stuck

Hi,
my Nexus 7 (2013) is stuck on Google screen...
a few days ago I downloaded a lot of movies via utorrent, and utorrent kept crashing. So i forced stop, removed the app, reinstalled it from google play and continued.
My nexys then suddenly freezed for about 1-2mins before i shut it down via the power buttom, and since then it wont start...I've tried almost everything.
The device is stuck on Google screen. I've tried to boot it through the bootloader, recovery mode etc, but it's still stuck on the google screen. downloaded the nexus root toolkit to unlock my device, but it keeps tellin me i've to enable USB debugging. which I can't since my device won't start.
I've downloaded the SkipSoft Android tookit, but not too familiar with the tookit so haven't really tried anything yet (also not sure which android version i'm running)..
Is there ANYTHING i can do?
EDIT: tried using skipsoft android tookit to unlock bootloader, but when coming to the stage where i've to chose yes or no, the device get stuck and the power button does not respond => I can't chose Yes..
EDIT: So I've tried a few things but nothing seems to work..
downloaded a new adb+fastboot directory from another thread. Fastboot commands seems to work, but when i try and erase boot/cache etc the cmd does nothing...had this line for about 10min:
erasing 'boot'..
nothing happens.. when i unplug my device an error message shows (too many links).
so, fastboot won't erase my boot nor my cache, so i tried to fastboot flash bootloader bootloader.img, and it says my bootloader is locked.
fastboot oem lock --> bootloader is alrdy locked
fastboot oem unlock --> stuck at "YES", just as i was when trying with different toolkits.
fastboot -w update image-razor --> Error, failed to load 'img-razor'
soo i'm getting kinda desperate here...
remeber, this was all from a stock rom, no root, no custom rom, just from a freeze when dl movies from utorrent...

i have been stuck like that before. get into to the bootloader screen from where its hung at the google splash screen. once there you can fastboot a factory image.
from the google screen:
1. hold volume up, volume down and power until you get to the screen with the android and its belly open
2. connect to pc
3. download factory image from HERE
4. unzip the tar file you just downloaded and place the contents in your platform-tools folder
5. double click the file named flash-all.bat
6. wait for it to finish and it should boot up just fine.

jase33 said:
from the google screen:
1. hold volume up, volume down and power until you get to the screen with the android and its belly open
.
Click to expand...
Click to collapse
say what? Hold vol.up, vol.down and power until i get to bootloader?
when i press vol up, vold down, and power, holding them all in together from the google screen the device shuts down..
Do you have a youtube tutorial gudie or something?
EDIT:
Also, I've never rooted or done anythign with this tablet except downloading a few apps etc...this crash happened when downloading from utorrent...

The key combination is to be used from being powered off.

Fuzzra said:
The key combination is to be used from being powered off.
Click to expand...
Click to collapse
Yeah, and from what i can read it also needs an unlocked bootloader, which i don't have..

just keep holding the keys down. it will shut down. keep holding it will try to boot back up and take you to the bootloader screen. you do not need an unlocked boot loader. all my nexus devices have locked bootloaders, are rooted and run custom roms.

jase33 said:
just keep holding the keys down. it will shut down. keep holding it will try to boot back up and take you to the bootloader screen. you do not need an unlocked boot loader. all my nexus devices have locked bootloaders, are rooted and run custom roms.
Click to expand...
Click to collapse
shuts down, then nothing... tried holding it down for about a minute.

skampflens said:
shuts down, then nothing... tried holding it down for about a minute.
Click to expand...
Click to collapse
like this

jase33 said:
just keep holding the keys down. it will shut down. keep holding it will try to boot back up and take you to the bootloader screen. you do not need an unlocked boot loader. all my nexus devices have locked bootloaders, are rooted and run custom roms.
Click to expand...
Click to collapse
also, should add that i tried to unlock oem via the cmd, tried to flash boot.img but nothing..
when typing fastboot oem unlock, it got stuck at "Yes" when trying to unlock bootloader, and when typing flash boot, it said error, cannot flash boot.img..
AND i'm not running a custom rom, just the standard stock rom

one step at at a time. lets get you to the bootloader screen first. all good things happen from there.

jase33 said:
one step at at a time. lets get you to the bootloader screen first. all good things happen from there.
Click to expand...
Click to collapse
uploading a video....
only way i can access fastboot is via volume down and powerbutton..and that's when the device is shut down
<iframe width="560" height="315" src="//www.youtube.com/embed/SRfrjR9Y8fI" frameborder="0" allowfullscreen></iframe>

OK. but you can get there. yes?

jase33 said:
OK. but you can get there. yes?
Click to expand...
Click to collapse
Yes, I can access bootloader (fastboot mode).
tho i don't know which version i'm running..
it's either 4.4.2 (KOT49H) or 4.4 (KRT16S).
however, when running flash-all it says "fastboot is not recognized as an internal or external command"
http://www.youtube.com/watch?v=SRfrjR9Y8fI&feature=youtu.be

dont worry about version. it does not matter. lets focus on your connection to the device. do you have ADB setup on your pc? if you dont, go to THIS thread and get minimal ADB & fatboot from shimp208. install it and run it.

jase33 said:
dont worry about version. it does not matter. lets focus on your connection to the device. do you have ADB setup on your pc?
Click to expand...
Click to collapse
Yeah, at least i think so.. downloaded the adb bundle pack..

plug in your device and type "fastboot devices". tell me if you see a serial number display

jase33 said:
plug in your device and type "fastboot devices". tell me if you see a serial number display
Click to expand...
Click to collapse
nope, it says "fastboot" is not recognized as an internal or external command, oparable program or batch file.
http://www.youtube.com/watch?v=RLjLdHxuENg&feature=youtu.be

ok. you dont have fastboot. go and install Minimal ADB and Fastboot

jase33 said:
ok. you dont have fastboot. go and install Minimal ADB and Fastboot
Click to expand...
Click to collapse
serial nr does show!

great! have you downloaded the factory image for your device yet? get it HERE if you have not. make sure you get the right one. if your device is wifi only select that one, if it had mobile data and a sim card get the one for mobile..

[Q] Problem with flashing nexus 7

Hello everyone,
I found a nexus 7 on a second hand website for 20 euro's.
In the tekst he sayd that the nexus dos'nt boot up after upgrading the firmware update.
So i thought its possible to try to fix it.
If i start the nexus 7 i get the google screen with in the right top the tekst start.
if i push the power button the nexus restarts and shows the same screen again.
I can swith between start, reboot bootloader, recovery mode ecs. but all dos'nt work if i push the power button.
When i try to start the bootloader that works fine but when i try to unlock it, i get the screen with the security warning and i can select yes to unlock it or no.
But when i again push the power button it reboots and nothing happens, the nexus is'nt unlock.
Is there a another way to do this or is it ready to trow in the garbige?
Is there maybe a acript that automticly push yes in the unlock bootloader screen?
Sorry for my bad english.
Best regards.

ghghghg said:
Hello everyone,
I found a nexus 7 on a second hand website for 20 euro's.
In the tekst he sayd that the nexus dos'nt boot up after upgrading the firmware update.
So i thought its possible to try to fix it.
If i start the nexus 7 i get the google screen with in the right top the tekst start.
if i push the power button the nexus restarts and shows the same screen again.
I can swith between start, reboot bootloader, recovery mode ecs. but all dos'nt work if i push the power button.
When i try to start the bootloader that works fine but when i try to unlock it, i get the screen with the security warning and i can select yes to unlock it or no.
But when i again push the power button it reboots and nothing happens, the nexus is'nt unlock.
Is there a another way to do this or is it ready to trow in the garbige?
Is there maybe a acript that automticly push yes in the unlock bootloader screen?
Sorry for my bad english.
Best regards.
Click to expand...
Click to collapse
Cf Autoroot automatically unlocks the bootloader if it is locked: http://download.chainfire.eu/295/CF-Root/CF-Auto-Root/CF-Auto-Root-grouper-nakasi-nexus7.zip
worth the try. Try to flash the latest factory image after that

I tryed that one, but if i run it i get the unlock bootloader screen where i must select yes or no to unlock, but there i get stuck because if i push the power button to enter he reboots and i get that screen again.

Is there no solution to enter "Yes" in de unlock bootloader screen without using the power button or is there a script / program that auto write / flash the nexus 7, because i can't still flash that damn thing.
Asus must use another program to bring back the ship that is in the nexus, is there no thread or something that handles that problem without sending it to repair it.

OnePlus 2 stuck in reboot screen!!

So, i was following this tutorial on how-to set up TWRP and Root my OP2.
Everything seemed to be going to plan until the final step where i reboot my phone & now its stuck on the little animation screen with the red & two little white dots..
have absolutely no idea how to fix this help? anyone? PLEASE!!!!
ps. tried holding down power & volume down (nothing happens) also tried using the command prompt on windows but its 'Waiting for device' if any of that helps the cause.

eoinkearney95 said:
So, i was following this tutorial on how-to set up TWRP and Root my OP2.
Everything seemed to be going to plan until the final step where i reboot my phone & now its stuck on the little animation screen with the red & two little white dots..
have absolutely no idea how to fix this help? anyone? PLEASE!!!!
ps. tried holding down power & volume down (nothing happens) also tried using the command prompt on windows but its 'Waiting for device' if any of that helps the cause.
Click to expand...
Click to collapse
Try flashing stock rom through fastboot: http://www.androidsage.com/2016/03/12/restore-oneplus-2-full-stock-firmware/
Try Flashing stock rom through TWRP: http://downloads.oneplus.net/oneplus-2/oneplus_2_oxygenos_3.0.2/
You said that you are unable to get to recovery with the volume keys but I think you are doing it wrong. So to get to recovery power off the device by holding the power button. And then keep holding volume down and power button until you see the oneplus logo and feel the vibration. Let go of both of the buttons once the vibration finish's because if do it to early it will not go to twrp. If if does not work try multiple times

Dead oneplus2.
Hi guys and thanks to all xda community for helping us. I tried to upgrade from 2.0.2 to 3.0.2. But after the instalation my oneplus2 stucks into bootlogo(powered by android). Before i try to upgrade i forgot to enable on system oem unlocking. Now i'm not having access to recovery option,when i try to press volume- +power the op2 vibrate and flashes the screen till i stop pressing the power button,and when i try to enable oem via fastboot always get this message: <remote oem unlock is disabled>. I tried so many option but always getting this message: remote oem unlock is disabled. Please help me...

eoinkearney95 said:
So, i was following this tutorial on how-to set up TWRP and Root my OP2.
/QUOTE]
@eoinkearney95 did you installed the proper version of Supersu..?
Click to expand...
Click to collapse

Bibin John said:
eoinkearney95 said:
So, i was following this tutorial on how-to set up TWRP and Root my OP2.
/QUOTE]
@eoinkearney95 did you installed the proper version of Supersu..?
Click to expand...
Click to collapse
I dont know. i tried to instal the 3.0.2 sending the firmware to the folder downloads and then i restarted the op2 in recovery mode and the choosed the option to instal from the internal storage.
Click to expand...
Click to collapse

ciroportugues said:
Hi guys and thanks to all xda community for helping us. I tried to upgrade from 2.0.2 to 3.0.2. But after the instalation my oneplus2 stucks into bootlogo(powered by android). Before i try to upgrade i forgot to enable on system oem unlocking. Now i'm not having access to recovery option,when i try to press volume- +power the op2 vibrate and flashes the screen till i stop pressing the power button,and when i try to enable oem via fastboot always get this message: <remote oem unlock is disabled>. I tried so many option but always getting this message: remote oem unlock is disabled. Please help me...
Click to expand...
Click to collapse
Try this mega unbrick guide and try all the methods if the other ones do not work: https://forums.oneplus.net/threads/...ck-guide-for-a-hard-bricked-oneplus-2.347607/

Stuck in Boot Loop

Have searched the forum but came up empty.
Hoping someone can help.
Purchased the phone used back in December and have been using it as-is. Two OTA updates came through fine. The latest OTA update has it stuck in a boot loop.
- I can get to fastboot with power and volume down buttons but all of the options either turn it off or stick it back in the loop again (Essential logo with powered by Android, NO dot animation)
- Can't see it via "adb devices" since developer mode was likely not enabled
- "fastboot devices" can see the phone but can't change slots or do anything else
I saw two other people who've posted something similar but no solution. Is my phone garbage?
Any help is appreciated.

harpoon said:
Have searched the forum but came up empty.
Hoping someone can help.
Purchased the phone used back in December and have been using it as-is. Two OTA updates came through fine. The latest OTA update has it stuck in a boot loop.
- I can get to fastboot with power and volume down buttons but all of the options either turn it off or stick it back in the loop again (Essential logo with powered by Android, NO dot animation)
- Can't see it via "adb devices" since developer mode was likely not enabled
- "fastboot devices" can see the phone but can't change slots or do anything else
I saw two other people who've posted something similar but no solution. Is my phone garbage?
Any help is appreciated.
Click to expand...
Click to collapse
Damn, that's a bit unlucky, this March update said it would make recovery from a loop after OTA update easier to recover from, which might just have helped you. Sorry not sure how to help fix at present.

you can try flashing one of these https://forum.xda-developers.com/essential-phone/development/stock-7-1-1-nmj20d-t3701681
be sure to pick one with the fastboot images

harpoon said:
- Can't see it via "adb devices" since developer mode was likely not enabled
- "fastboot devices" can see the phone but can't change slots or do anything else
Click to expand...
Click to collapse
A couple of questions:
- Is your BL unlocked (or is OEM Unlocking enabled)?
What happens if you try executing "fastboot flashing unlock"? NOTE: this would WIPE your data if successful.
- Can you get to the Recovery mode? It's when you pick "Recovery" option from fastboot mode, see the lying android with an exclamation sign, then hold Power and press VolumeUp to get to the Recovery menu.

kt-Froggy said:
A couple of questions:
- Is your BL unlocked (or is OEM Unlocking enabled)?
What happens if you try executing "fastboot flashing unlock"? NOTE: this would WIPE your data if successful.
- Can you get to the Recovery mode? It's when you pick "Recovery" option from fastboot mode, see the lying android with an exclamation sign, then hold Power and press VolumeUp to get to the Recovery menu.
Click to expand...
Click to collapse
Thanks for your response.
- I dont belive OEM unlocking is enabled.
- I can get to the fastboot menu, but the recovery mode option just takes me back to the 'powered by android' logo, not the green dead robot.
- When I try fastboot flashing unlock, I get the below error:
=============
FAILED (remote: Flashing Unlock is not allowed
)
finished. total time: 0.013s
=============

yenkoPR said:
you can try flashing one of these https://forum.xda-developers.com/essential-phone/development/stock-7-1-1-nmj20d-t3701681
be sure to pick one with the fastboot images
Click to expand...
Click to collapse
Will this work even though I cannot see the device via adb? AND the device state is "locked".

harpoon said:
- I dont belive OEM unlocking is enabled.
- I can get to the fastboot menu, but the recovery mode option just takes me back to the 'powered by android' logo, not the green dead robot.
- When I try fastboot flashing unlock, I get the below error:
Click to expand...
Click to collapse
Dang... :\ Yeah, the last error means you don't have OEM unlock enabled. So, you can't flash the bts image via fastboot. One last thing I could think of is trying to get to recovery by the button combo. Although, if you are correct in saying you don't have USB debug enabled, it won't do much good, i.e. you won't be able to flash an OTA... :\
While device is OFF, press and hold Volume-Up button while pushing Power button to boot.
Your device will now be in Recovery mode. An Android logo with red exclamation mark should appear on screen. Hold the Power button, then press the Volume-Up button one time to see the recovery menu.

can you try this command on bootloader:
fastboot OEM unlock

harpoon said:
Have searched the forum but came up empty.
Hoping someone can help.
Purchased the phone used back in December and have been using it as-is. Two OTA updates came through fine. The latest OTA update has it stuck in a boot loop.
- I can get to fastboot with power and volume down buttons but all of the options either turn it off or stick it back in the loop again (Essential logo with powered by Android, NO dot animation)
- Can't see it via "adb devices" since developer mode was likely not enabled
- "fastboot devices" can see the phone but can't change slots or do anything else
I saw two other people who've posted something similar but no solution. Is my phone garbage?
Any help is appreciated.
Click to expand...
Click to collapse
Hi. A long time has passed and I want to know if you have solved your problem. I came across the same)

Rudter said:
Hi. A long time has passed and I want to know if you have solved your problem. I came across the same)
Click to expand...
Click to collapse
Nothing ! ..
my ph-1 still into the drawer ! .