[INFO] Unlocked / Locked Bootloader ! | Good to know |

[surdu_petru]

Hi !

To be clear for all the people !!!

As long as you keep locked bootloader - you can not install any custom recovery ( like CWM or TWRP ) !!!
Without custom recovery - your device is not able to run any custom rom !!!

WHY ?

• with locked bootloader you can install only the officialy firmware ! ( or some custom updates, proper signed and does not include rewriting the boot or recovery partition )
• when installing an official update will overwrite among others, the boot & recovery partition and system android - all this are in the blob files - ( you can see blob file ~ 820MB if you unpack twice officialy archive )
• with unlocked bootloader you can rewrite boot & recovery partition & also system partition ;
• practice by unlocking bootloader - first, we allowed to rewrite recovery partitions - so necessary to install a custom recovery and than an custom rom !
• by installing an custom recovery - we must only to rewrite the boot partition & system partition - what it includes an custom rom !

To recap :

• officialy firmware = blob file , which included : recovery , boot & system partition + ..... ;
• custom rom = custom_rom.zip , which included : boot partition & system partition ;
• custom recovery = CWM or TWRP , which included only recovery partition ;

On our device Asus TF300T :

• recovery partition = twrp.blob or cwm.blob
• boot partition = boot.blob ( ... also kernel.blob or or any other file that includes the boot partition .blob )
• system partition = /system

A little help for those who remain stuck in boot ( bootloop ) after installing a custom rom :

• by installing an custom rom - sure you have already installed an custom recovery !
• available only to those who can access custom recovery ( after this step you will install officialy firmware ) : download and unpack officialy firmware archive -> you will get a new zip archive ! now copy this new archive in your device or microSD and flash it in recovery by wiping cache, dalvik-cache & factory-reset !
• available if you can access fastboot mode ( after this step you will install officialy firmware ) : download and unpack twice officialy firmware archive and extract blob file ! , now copy blob file and navigate to ../sdk/android-sdk/platform-tools/ , open a cmd command and type:
  • > fastboot -i 0x0B05 flash staging blob

By installing an officialy firmware 4.1 , bootloader will be updated to JB bootloader !


...also you can try, my Custom Roms for Asus TF300T : 1° BlueAndroid & 2° [email protected]
( Roms based on Stock Asus Firmware : fast , stable & and high performance ! )

regards,
Surdu Petru

 

[vap_66]

Thanks, should be made sticky.

Trimis de pe ASUS Transformer Pad TF300T

 

[surdu_petru]

Thanks, should be made sticky.

Trimis de pe ASUS Transformer Pad TF300T

Hi !

Thanks, you're very kind...I do not think it's really that important
...sure, it is quite important for those who do not know - and cover a wide area, almost all android models go by the same principle !
Good luck !:good:

 

[noriya]

Asus make my tf300t useless now,i cant unlocked bootloader,always said unknown error and network problem....no custom rom for me is dont know what to do with it.anyone can help me?i use 4.1.1 10.4.2.13 from usa.

 

[tobdaryl]

This thread deserves to be sticky. Please rate it as you see fit. I have given five stars as I see questions daily that are answered here. Very plainly I might add!
Thanks good work!

 

[surdu_petru]

Asus make my tf300t useless now,i cant unlocked bootloader,always said unknown error and network problem....no custom rom for me is dont know what to do with it.anyone can help me?i use 4.1.1 10.4.2.13 from usa.

Hi !

You can try this :
- please, download the last firmware 10.4.2.18 SKU -> US from here !
- extract blob files , put your device in fastboot mode, enable USB debuging in Settings, connect USB cable and , in /platform-tools directory from android sdk type : > fastboot -i 0x0B05 flash staging blob
Now , after installation , try to redownload and install from here ! ( Utility , Version V7 -> Unlock Device App: Unlock boot loader. !)
( it say that is also for JB ! "※This tool now only works with TF300T ICS & JB of TW,US,WW CN SKU. It won’t work on other devices." )
Good luck !

- for use fastboot , you need to have already installed in your PC , android SDK ! :good:

 

[Sparkimus]

Asus make my tf300t useless now,i cant unlocked bootloader,always said unknown error and network problem....no custom rom for me is dont know what to do with it.anyone can help me?i use 4.1.1 10.4.2.13 from usa.

I'm having the same issue. I can't unlock with the app. From what I have read, it has something to do with Asus not having the SN of some devices in the unlocking database.

Sent from my ASUS Transformer Pad TF300T using Tapatalk HD

 

[MikeTrifixion]

I'm having the same issue. I can't unlock with the app. From what I have read, it has something to do with Asus not having the SN of some devices in the unlocking database.

Sent from my ASUS Transformer Pad TF300T using Tapatalk HD

So bassicaly the only thing we can do is wait?

 

[surdu_petru]

So bassicaly the only thing we can do is wait?

I'm afraid you're right..Asus really need to do an update to app for unlock bootloader !

 

[tjy8tim]

I'm afraid you're right..Asus really need to do an update to app for unlock bootloader !

is anyone actually working on getting root for JB? or is all the dev just assuming people can unlock when they are on JB?

 

[surdu_petru]

is anyone actually working on getting root for JB? or is all the dev just assuming people can unlock when they are on JB?

Hi !

Ireally don't know ... I managed to unlock it from the time he was in android ics !
- but as you saw, Asus says it works even if you are in android JB ! ...

 

[johnnyk75]

thanks for the info good for all

 

[downtownscience]

I'm having the same issue. I can't unlock with the app. From what I have read, it has something to do with Asus not having the SN of some devices in the unlocking database.

Sent from my ASUS Transformer Pad TF300T using Tapatalk HD

That is correct.

First you must register your tablet. Soon after that the unlock utility will work.

Problem for me is that my serial number comes up as invalid. The number on the bottom of my box, warranty card, and sticker near dock port all match. I've had to submit my proof of purchase to them in order to add my serial number to the database that will allow me to register. Good times.

Anyone have similar issues with registration?

Sent from my VS910 4G using xda premium

 

[giant25]

That is correct.

First you must register your tablet. Soon after that the unlock utility will work.

Problem for me is that my serial number comes up as invalid. The number on the bottom of my box, warranty card, and sticker near dock port all match. I've had to submit my proof of purchase to them in order to add my serial number to the database that will allow me to register. Good times.

Anyone have similar issues with registration?

Sent from my VS910 4G using xda premium

I registered with the serial number listed in Android Settings on December 25th. However, the serial number on the box is different. As of today, unlock tool still has the Unknown Error message. Running latest .18 jelly bean. My registration with ASUS shows up as successful. We'll see...

 

[downtownscience]

I registered with the serial number listed in Android Settings on December 25th. However, the serial number on the box is different. As of today, unlock tool still has the Unknown Error message. Running latest .18 jelly bean. My registration with ASUS shows up as successful. We'll see...

Have you contacted them yet?

Their support is priceless...I mean worthless. :-/

Sent from my VS910 4G using xda premium

 

[giant25]

Have you contacted them yet?

Their support is priceless...I mean worthless. :-/

Sent from my VS910 4G using xda premium

Nope, haven't tried yet. Last resort for me...

 

[surdu_petru]

Hi!

In case anyone needs this information ! :good:

 

[JoeyMack47]

Registered. We'll see...

That is correct.

First you must register your tablet. Soon after that the unlock utility will work.

Problem for me is that my serial number comes up as invalid. The number on the bottom of my box, warranty card, and sticker near dock port all match. I've had to submit my proof of purchase to them in order to add my serial number to the database that will allow me to register. Good times.

Anyone have similar issues with registration?

Sent from my VS910 4G using xda premium

Just got done registering my *USED* TF300T. Hopefully soon I will be able to unlock it. <sigh>