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Flatline - Unbrickable Nexus 7 (Wi-Fi + 3G)

OP rayman

23rd September 2013, 09:53 PM   |  #1  
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The AndroidRoot.Mobi Team is proud to present Flatline: Nvflash for Nexus 7 & Nexus 7 3G (2012)

This release allows generating nvflash blobs for your specific device, making your device unbrickable as long as you have a copy of the blobs.
As a brand new feature, it will also enable wifi and upload a copy of the blob to androidroot's server. Later, a solution will be released to retrieve the blobs from the server if you ever loose them.

https://www.androidroot.mobi/pages/guides/tegra3-guide-nvflash-jellybean/

Credit goes to the AndroidRoot.Mobi team:
Bumble-Bee (Apache14), IEF, kmdm, lilstevie & RaYmAn.
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24th September 2013, 05:45 AM   |  #2  
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Ah yes! This makes updating the bootloader a less scary procedure. (It happened to me and I had to send an RMA request. Fortunately, they accepted it.) I do have a question. Are the blobs hardware specific for the Nexus 7? (Flashing someone's Nexus 7 dump to mine.)

Sent from my Nexus 7 using xda app-developers app
Last edited by BrianXP7; 24th September 2013 at 07:34 AM.
24th September 2013, 08:15 AM   |  #3  
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Quote:
Originally Posted by BrianXP7

Ah yes! This makes updating the bootloader a less scary procedure. (It happened to me and I had to send an RMA request. Fortunately, they accepted it.) I do have a question. Are the blobs hardware specific for the Nexus 7? (Flashing someone's Nexus 7 dump to mine.)

Sent from my Nexus 7 using xda app-developers app

The blobs are device-specific. They will only works on your particular device and no one elses.
Otherwise, we would have just released pre-made blobs
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24th September 2013, 08:21 AM   |  #4  
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Quote:
Originally Posted by rayman

The blobs are device-specific. They will only works on your particular device and no one elses.
Otherwise, we would have just released pre-made blobs

Thanks for the heads up. (Before I dun goofed my phablet again...) I'm still a little paranoid (no pun intended) about the idea of flashing another bootloader after...well, look above. It's kind of an ironic situation where you risk it corrupting the bootloader again for bootloader recovery. XD Well, thanks for this guide and the set of tool provided. Anyway, is the bootloader usable as a daily drive or do I have to flash back to the official image? Any chance on a 4.23 image?
Last edited by BrianXP7; 24th September 2013 at 08:26 AM.
24th September 2013, 10:47 AM   |  #5  
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Hi! I have tried to nvflash my TF300T with the new guide, but after generating the blob.bin and run whille I am getting an error:
Code:
Wheelie 0.1 - Preflight for nvflash.
Copyright (c) 2011-2012 androidroot.mobi
========================================

Waiting for device in APX mode...
[=] Chip UID: 0x15d2d4228340213
[-] Incorrect BLOB selected. nverror: 0x4.
Seems like the bootloader didn't flash the first time - after the second try and regenerating the nvflash files it works.
Last edited by dragonnn; 24th September 2013 at 10:53 AM.
24th September 2013, 11:34 PM   |  #6  
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so the guide on androidroots website should be followed before you start tinkering with your device? just wondering. I have an N7, but have never messed it up to the point where fastbooting the factory image doesn't work. only killed it due to a hardware error
25th September 2013, 12:47 AM   |  #7  
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Can you still use this if you can only access the APX mode due to a bricked tablet?
25th September 2013, 01:47 AM   |  #8  
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Quote:
Originally Posted by TeCKNeiC

Can you still use this if you can only access the APX mode due to a bricked tablet?

I guess you need to generate the blob files prior, unfortunately. Without it, I guess you're stuck with an RMA (if your warranty is still valid).

---------- Post added at 04:47 PM ---------- Previous post was at 04:22 PM ----------

I successfully backed up the blobs and partition images. I'm happy someone finally found a unbrickable solution. However, I tried flashing back the stock bootloader (4.23) but it displayed "Signature mismatch." in red on the top left corner and failed. (Luckily, I can still interactive with the bootloader menu.) Would flashing a ZIP with the image inside work as a workaround? Is there a special procedure that I have to perform? Are you going to release a modified 4.23 bootloader?
25th September 2013, 03:27 AM   |  #9  
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Quote:
Originally Posted by BrianXP7

[/COLOR]I successfully backed up the blobs and partition images. I'm happy someone finally found a unbrickable solution. However, I tried flashing back the stock bootloader (4.23) but it displayed "Signature mismatch." in red on the top left corner and failed. (Luckily, I can still interactive with the bootloader menu.) Would flashing a ZIP with the image inside work as a workaround? Is there a special procedure that I have to perform? Are you going to release a modified 4.23 bootloader?

Try flashing the bootloader with nvflash rather than fastboot, flashing the bootloader from fastboot and recovery is subject to a signature check.
25th September 2013, 03:39 AM   |  #10  
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Quote:
Originally Posted by lilstevie

Try flashing the bootloader with nvflash rather than fastboot, flashing the bootloader from fastboot and recovery is subject to a signature check.

Wouldn't that flash the modified bootloader? Also, I can't find instructions on flashing the bootloader under NVFlash.

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