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Can't unlock bootloader on my Nexus 7

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Chillwood
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Default Can't unlock bootloader on my Nexus 7

I'm trying to unlock bootloader.
After command "fastboot oem unlock", I get the error:
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(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.
 
HellcatDroid
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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.
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Chillwood
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Quote:
Originally Posted by HellcatDroid View Post
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.
Bootloader version 3.34.

fastboot reboot-bootloader did not help(( displays the same error.
 
greenolive
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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.

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Chillwood
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(Last edited by Chillwood; 27th November 2012 at 05:11 PM.)
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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).
 
Chillwood
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I've booted my device in APX mode.. How to flash bootloader on my device with NvFlash?
 
Omar04
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Edited

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veeman
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Try updating the bootloader and then trying to unlock.

Sent from my Nexus 7
 
HellcatDroid
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Quote:
Originally Posted by Chillwood View Post
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).
Go to recovery and try a fctory reset/wipe.

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Originally Posted by Chillwood View Post
I've booted my device in APX mode.. How to flash bootloader on my device with NvFlash?
No way to do that so far.
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Chillwood
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Originally Posted by HellcatDroid View Post
Go to recovery and try a fctory reset/wipe.
When I go into recovery, all I see - this is the android icon with a red exclamation mark. Nothing more..

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