Attend XDA's Second Annual Developer Conference, XDA:DevCon 2014!
5,730,529 Members 40,360 Now Online
XDA Developers Android and Mobile Development Forum

Can't unlock bootloader on my Nexus 7

Tip us?
 
Chillwood
Old
#1  
Junior Member - OP
Thanks Meter 0
Posts: 11
Join Date: Nov 2012
Default 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.
 
HellcatDroid
Old
#2  
HellcatDroid's Avatar
Senior Member
Thanks Meter 771
Posts: 1,026
Join Date: Jul 2011
Location: Cologne Area

 
DONATE TO ME
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.
Quote:
The process com.xda.forum.signature has stopped unexpectedly. Please try again.
Quote:
[ Force Close ]
 
Chillwood
Old
#3  
Junior Member - OP
Thanks Meter 0
Posts: 11
Join Date: Nov 2012
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
Old
#4  
Senior Member
Thanks Meter 59
Posts: 145
Join Date: Aug 2010
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
 
Chillwood
Old
(Last edited by Chillwood; 27th November 2012 at 05:11 PM.)
#5  
Junior Member - OP
Thanks Meter 0
Posts: 11
Join Date: Nov 2012
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
Old
#6  
Junior Member - OP
Thanks Meter 0
Posts: 11
Join Date: Nov 2012
I've booted my device in APX mode.. How to flash bootloader on my device with NvFlash?
 
Omar04
Old
#7  
Omar04's Avatar
Senior Member
Thanks Meter 1274
Posts: 2,434
Join Date: Jul 2011
Edited

Sent from my SPH-D710 using Tapatalk 2
 
veeman
Old
#8  
veeman's Avatar
Senior Member
Thanks Meter 1514
Posts: 9,404
Join Date: Apr 2012
Location: Minnesota
Try updating the bootloader and then trying to unlock.

Sent from my Nexus 7
 
HellcatDroid
Old
#9  
HellcatDroid's Avatar
Senior Member
Thanks Meter 771
Posts: 1,026
Join Date: Jul 2011
Location: Cologne Area

 
DONATE TO ME
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.

Quote:
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.
Quote:
The process com.xda.forum.signature has stopped unexpectedly. Please try again.
Quote:
[ Force Close ]
 
Chillwood
Old
#10  
Junior Member - OP
Thanks Meter 0
Posts: 11
Join Date: Nov 2012
Quote:
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..

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


XDA PORTAL POSTS

Hide Numbers on Your SMS and Call Logs with Reflection

How many times have you given your device to someone else in order to show them a … more

Implement Split View in Your LG G2 KitKat Rom with Automated Installer

Some of you may have remembered a story on the Portal a few weeks back … more

Cast Your Device Screen the Way it Was Meant to be with Second Screen

Not too long ago here on the XDA Portal, we covered how Google had made … more

Samsung Gear Live Unboxed the XDA Way – XDA Developer TV

XDA Developer TV Producer AdamOutleris known for his XDA Unboxingseries where … more