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How to update to JB and keep root (Locked Bootloader)

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By pileot, Senior Member on 8th October 2012, 04:53 AM
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15th October 2012, 01:45 AM |#21  
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Quote:
Originally Posted by pileot

To reset the tablet:
Determine which version you are running. For me it was .30WW
Go to www.asus.com and download the firmware for your version
plug your tablet into your usb on your computer, unzip the firmware and put it in the root of your tablet (Dont use USB or SD cards, just transfer it directly)
restart your tablet, it SHOULD load the file and go about resetting the tablet to stock.
If that does not work, try starting the tablet holding power and volume down, on the splash screen press volume up and reset the tablet that way.
Once your tablet is returned to stock you can proceed.

A couple of problems:

1) A contradiction (seemingly) that you say "plug your tablet into your usb on your computer" then "Dont use USB or SD cards"
That needs some clarification - if you plug into usb then you are using USB.

2) The above method doesn't work for me. By copying the file to the root of the tablet's sdcard I see two problems, a) Andy falls over - the error is that it can't find EP201_768_SDUPDATE.ZIP so by dropping the original filename this won't work without renaming. b) even if you rename it, it still complains because it's looking for it on the external sd card.

Unless I'm missing something I couldn't get your method to work. Also once I did rename it and put it on the external card, I still end up with a desktop full of my app shortcuts and data intact which implies either that this method doesn't clear data or it hasn't worked.

Would appreciate some clarification, I'm fully prepared to accept I've done something stupid but so far I've not been successful following the above.
 
 
15th October 2012, 11:45 PM |#22  
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@louiscar
1) A contradiction (seemingly) that you say "plug your tablet into your usb on your computer" then "Dont use USB or SD cards"
That needs some clarification - if you plug into usb then you are using USB.


Plug your tablet into your USB on your computer and put it in the root of your tablet, don't put it into USB cards or SD cards.


Downgrade from .30 to .26 with a locked bootloader ?

I am going to downgrade from JB .16 to ICS .30 in order to root my device, but I also would like to unlock bootloader so I would need to downgrade again to .26. I read sometimes "signature mismatch" then it's not possible, but I also read "I did it, it does work". What's the truth ?
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16th October 2012, 01:39 AM |#23  
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Quote:
Originally Posted by StiiLe

@louiscar
1) A contradiction (seemingly) that you say "plug your tablet into your usb on your computer" then "Dont use USB or SD cards"
That needs some clarification - if you plug into usb then you are using USB.


Plug your tablet into your USB on your computer and put it in the root of your tablet, don't put it into USB cards or SD cards.


Downgrade from .30 to .26 with a locked bootloader ?

I am going to downgrade from JB .16 to ICS .30 in order to root my device, but I also would like to unlock bootloader so I would need to downgrade again to .26. I read sometimes "signature mismatch" then it's not possible, but I also read "I did it, it does work". What's the truth ?

I think you're confusing.
1. You can downgrade from JB to .30 and you can root once you're on .30.
2. You can root your device while you're on JB, but you need to Unlock your device first (unlock tool for ICS will work with JB)
3. Bootloader signature for .30 and JB are the same, but not same as .22 or .26, so you can't downgrade from JB or .30 to .26/.22, However, if you have a backup of NVflash, you could downgrade from .30/JB to .26
Hope it's clear for you.
16th October 2012, 08:52 AM |#24  
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Quote:
Originally Posted by buhohitr

I think you're confusing.
1. You can downgrade from JB to .30 and you can root once you're on .30.
2. You can root your device while you're on JB, but you need to Unlock your device first (unlock tool for ICS will work with JB)
3. Bootloader signature for .30 and JB are the same, but not same as .22 or .26, so you can't downgrade from JB or .30 to .26/.22, However, if you have a backup of NVflash, you could downgrade from .30/JB to .26
Hope it's clear for you.

Yes, I understand the 1st and 2nd answer. The 3rd I was not sure about it. Thank you.
Now, I know that I can't unlock my TF700 anymore because I'm on JB... I just can root it with the downgrade to .30. I should have tried NVflash !!
16th October 2012, 06:35 PM |#25  
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Quote:
Originally Posted by StiiLe

Yes, I understand the 1st and 2nd answer. The 3rd I was not sure about it. Thank you.
Now, I know that I can't unlock my TF700 anymore because I'm on JB... I just can root it with the downgrade to .30. I should have tried NVflash !!

Nope, you are incorrect, you still can UNLOCK your device with JB. The unlock tool for ICS will work with JB.
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16th October 2012, 07:07 PM |#26  
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Quote:
Originally Posted by buhohitr

Nope, you are incorrect, you still can UNLOCK your device with JB. The unlock tool for ICS will work with JB.

Ohhhhhh seriously ! ROM Custom is finally mine ?!
Thank you, I thought that the unlock tool was only for ICS .26 or less.
16th October 2012, 07:10 PM |#27  
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Quote:
Originally Posted by StiiLe

Ohhhhhh seriously ! ROM Custom is finally mine ?!
Thank you, I thought that the unlock tool was only for ICS .26 or less.

Cheers bro!!!!!
16th October 2012, 08:10 PM |#28  
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Quote:
Originally Posted by StiiLe

Ohhhhhh seriously ! ROM Custom is finally mine ?!
Thank you, I thought that the unlock tool was only for ICS .26 or less.

I think on Asus site is states the unlocker is for ICS only. However, with the experience of people here who've probably tried it I'm sure that buhohitr is correct.
17th October 2012, 01:35 AM |#29  
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Followed all the steps (very clear write-up, btw), and it didn't work. I copied the files from my PC to the tablet, and got the red exclamation. Then, I downloaded the files using the tablet, moved the files and changed permissions. Temp-unrooted, booted into the recovery and it took off. I am now rooted on JB. Nice!
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17th October 2012, 01:43 AM |#30  
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Thank you to the OP for preserving my sanity.
I was one of those that lost root with the JB OTA and was using the upgrade firmware from the Asus website ( V10.4.4.16 Only for US SKU (Android 4.1.1)) to update after downgrading back to 30 and rooting. As others have attested, it was to say the least, an aggravating experience (many times over). Stumbled upon this thread and in a matter of minutes, was enjoying the fruits of rooted JB.
I think the "All in one guide" is missing something. This 0ne.
17th October 2012, 08:49 PM |#31  
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Unhappy Didn't quite work all the way...
First, thank you for pulling this together. I had been all over the place trying to get an understanding as to how to keep root when updating to JB. This thread is useful, important!

But the bad news is that it didn't work for me. Following are the steps that I did and some comments about them.

TF700T is unlocked but IS rooted.

All stock apps are restored. (I only had some disabled but all are enabled now.)

No custom build.prop.

I decided to reset the tablet to be sure.

Running 30US, got it from ASUS via PC.

Unzipped it on PC...

...changed the name to EP201_768_SDUPDATE.zip as per instructions elsewhere. (The rename was not on your reset instructions but it didn't work without doing this.)...

Put EP201_768_SDUPDATE.zip into root of tablet.

Restarted tablet.

It did not load the file...

Held power and vol down, on splash pressed vol up.

Update successful to stock.

Rooted using Debugfs automated root instructions.

Saved root using OTA Rootkeeper.

Got the US JB file using the link on this thread.

Got the command file using the link on this thread and unzipped it.

Put the unzipped command file into /cache/recovery directory using Root Browser.

Changed permissions to RW-R-R

Put the dlpkgfile file into /cache directory using Root Browser.

Changed permissions to RW-R-R

Checked that files named correctly and permissions as per this thread.

Went into OTA Rootkeeper and TEMP UNROOT.

Shut down the tablet.

Remove the USB cord.

Eject the Micro SD card.

UNdock the tablet.

press and hold both the power and volume down

Soon as the splash screen came up, released the power and volume down buttons and pressed volume up.

Got a dead android. (I don't mean bricked, just the android with the red chest.. The OS came back up okay after restarted it.)

Any suggestions for me? I did this several times being very careful to follow the instructions exactly. I'm looking forward to increased stability that presumably comes with JB. But need to keep root for TB, etc.

Thank you.
Edro
Last edited by edrodata; 17th October 2012 at 09:08 PM. Reason: needed to clarify what I meant by "dead android"

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