[Q] How to Downgrade to 4.1.1 or Original for TF300T???

[rakesh219]

Hey guys!

I am trying to downgrade my current Stock 4.2.1 Rom to either 4.1.1 or 4.1.2 either stock or custom if possible even factory original.
How would I go about doing this as there is no clear cut instructions I could find....not sure if I can use NVFlash???

I previously had root performed using the VoodooOTA Method. Now I have unlocked the bootloader and also managed to install the TWRP Custom Recovery....although I do not think it has been installed correctly as it is unable to mount certain directories...../cache or /data and /system are some examples.....not sure if that is because of version or because of changes done to root enabler by new firmware upgrade.

If anyone has clear instructions or could point me in the right direction I would highly appreciate it!

Thanks

 

[crossmission]

There might be a few issues with the new OTA update and recovery, if you already have a backup with nvflash from when you had ICS then yes there is a guide you can use to go back,

http://forum.xda-developers.com/showthread.php?t=1894867

if not then you should either try to flash one of the stock ROMs mentioned in the sticky in the Android Development section

http://forum.xda-developers.com/showthread.php?t=1697227

or if you think twrp is not working well you should wait just in case you do damage to your device. There is a chance some partitions have been altered in the new update and twrp needs to be updated, by whoever is responsible for our version, to be able to function properly.

If the reason you want to go back is the launcher then there is an option to switch to the 4.1 launcher in the options, not sure where exactly but if you look a bit further down in this section you'll find someone else posting something about it.

And a last suggestion is that when you have a question better post it in the appropriate section

Sent from my ASUS Transformer Pad TF300TG using XDA Premium HD app

 

[rakesh219]

hahahaha! funny u mention that coz i think I screwed up :silly: ...What I did was download the official bootloader from the Asus Website ASUS Transformer Pad TF300T Firmware: V10.4.2.20 Only for US SKU (Android 4.1) and use fastboot to flash the blob file.....now the only thing it does is spin at ASUS (boot loop)....The funny thing is it did affect how the fast boot option loads though it now shows up with the option of USB....and does not automatically go to fastboot.....my comp recognizes both in fastboot and adb the device so there is something......just performed a cache and dalvik wipe but to no vail and prior did a fix permission.....ALSO I do not receive any error with regards to mounting like before....

btw....which section would this fall under??? Development?

 

[rakesh219]

OKAY!!!!!! Im back in business.....WOOT!!! It worked just had to perform a factory reset to stop boot loop

 

[crossmission]

btw....which section would this fall under??? Development?

this belongs to the q&a section

OKAY!!!!!! Im back in business.....WOOT!!! It worked just had to perform a factory reset to stop boot loop

Glad you fixed it but try not to do things you're not sure of in the future so as not to brick it :victory:

 

[ilyuha1108]

Wow, you managed to downgrade. Can you post a proper instruction?

Sent from my LT22i using xda premium

 

[Ashcunak]

Wow, you managed to downgrade. Can you post a proper instruction?

Sent from my LT22i using xda premium

wait what? he downgraded backwards with out unlock or with unlock?

details please im sorta lost on what happened here.

 

[rakesh219]

Yup sure can do it just give me a few hours trying to fix the dishwasher :good:

 

[Ashcunak]

Yup sure can do it just give me a few hours trying to fix the dishwasher :good:

any chance your running WW and not US and could now grab us the WW OTA update file

 

[crossmission]

Wow, you managed to downgrade. Can you post a proper instruction?

Sent from my LT22i using xda premium

wait what? he downgraded backwards with out unlock or with unlock?

details please im sorta lost on what happened here.

I am pretty sure he said that he is unlocked and running twrp, you can flash whatever rom you want from recovery but it will not bring back the ICS bootloader and the ability to have NVFLASH or even the 4.1 BL, so in reality he flashed a new rom and not actually downgrade to the previous state of the tablet.

 

[rakesh219]

wait what? he downgraded backwards with out unlock or with unlock?

details please im sorta lost on what happened here.

I am pretty sure he said that he is unlocked and running twrp, you can flash whatever rom you want from recovery but it will not bring back the ICS bootloader and the ability to have NVFLASH or even the 4.1 BL, so in reality he flashed a new rom and not actually downgrade to the previous state of the tablet.

That is actually correct, I dont know if itwill work in general but I previously had my OS rooted and backed up using Voodoo OTA Rootkeeper. The only thing that I did new from here on is

1. Backup an Nandroid using ADB Terminal Access -

adb backup –apk –shared –all –f C:\Android_Asus_4-2-1.ab

Ofcourse in-order to perform this feat you would need Android SDK Tools Package and Google USB Drivers installed on the drive

2. Perform the unlock bootloader using the apk found on the Asus Website

3. Flash Stock Rom that can be downloaded from Asus or here

using fastboot

4. Flash TWRP for JB using fast boot with help of link

5. Go into recovery Wipe Dalvik and Cache and Factory Restore

6. And boot!

Okay I know this is no GUIDE as I am press with time....I will try to make a proper one. but in all honesty I would just wait for the REAL DEV's to post the solution to 4.2.1

 

[IceC47]

That is actually correct, I dont know if itwill work in general but I previously had my OS rooted and backed up using Voodoo OTA Rootkeeper. The only thing that I did new from here on is

1. Backup an Nandroid using ADB Terminal Access -

adb backup –apk –shared –all –f C:\Android_Asus_4-2-1.ab

Ofcourse in-order to perform this feat you would need Android SDK Tools Package and Google USB Drivers installed on the drive

2. Perform the unlock bootloader using the apk found on the Asus Website

3. Flash Stock Rom that can be downloaded from Asus or here

using fastboot

4. Flash TWRP for JB using fast boot with help of link

5. Go into recovery Wipe Dalvik and Cache and Factory Restore

6. And boot!

Okay I know this is no GUIDE as I am press with time....I will try to make a proper one. but in all honesty I would just wait for the REAL DEV's to post the solution to 4.2.1

Hi,
I need to downgrade my tab as my touch doesn't work and need to flash other firmware it. It was told to me to downgrade and it should work, but was said I need TWRP because with CWM I could brick my tab. Without touch it's impossible to use TWRP. I have ulocked bootloader and rooted. Your guide doesn't seem to need of use exactly TWRP as Wipe Dalvik and Cache is worked when I rooted tab.