Upgrade 10.6.27.5 Asus TF300T Android 4.2.1

[Willie92]

Running stock, with 10.4.2.9. Could never get the OTA update. Finally got around to trying a manual update. Downloaded 10.6.1.27.5 and system recognizes it, but calls it a "system downgrade."

Anybody know whats causing that?

 

[Willie92]

So after chatting with ASUS tech support who said that you can't downgrade tablets (interesting) and getting the go ahead from them (and sending myself an e-mail of the chat in case I bricked my tablet), I pressed ahead with the "downgrade" and everything worked fine and I'm now running Android 4.2.1!

So, if your'e manually updating and it calls it a "downgrade" you can press ahead without fear!

 

[zWarHawkz]

my wireless seems to work then not work on the tablet with the latest update

 

[emre1393]

is there possible downgrade to 4.1 from this update?

can you try for me? you just download update and copy to microsd and put to tablet. if a popup shows right bottom, i can downgrade to 4.1. because on 4.2, i can not connect university wifi(wpa enterprise or 801.x) but 4.1 is working.
thanks

 

[diofar]

Root TF300 and apply browser speed-up patch

Rooting latest firmware (Nov 2013) and installing the patch for speeding up browser

This process works great to the last firmware. It is based on the fact that the old 4.1 firmware was fully rootable with Motochopper, without needing to unlock your tablet. Just follow all of the steps exactly as written.

You need:
- the stock Firmware 10.4.2.20 from ASUS site (WW_epaduser_10_4_2_20_UpdateLauncher)
(last firmware before 4.2.1, which was fully rootable with Motochopper)
- motochopper.zip
- androidbrowsercached.zip
(the script-app that should be run to apply the patch for speeding browser)
(I included this file to the post, because it would be rather difficult to find it by yourselfs)

!!!!YOU WILL LOSE EVERYTHING IN YOUR TABLET!!!!!

Process
- Unzip (one level only) the WW_epaduser_10_4_2_20_UpdateLauncher to the root folder of a fat32 formatted microsd card
- Unzip androidbrowsercached.zip to the root folder of the same microsd card
- Insert this card in the tablet and press the exclamation mark to downgrade
- After the downgrade, delete WW_epad-user-10.4.2.20.zip from microsd card
- DO NOT INSTALL ANY UPDATE THAT THE TABLET WILL SHOW (in case the wifi was activated and the tablet already checked for a new update)
- Install Asus Sync to your PC in order to install Asus Drivers. Then you can uninstall just the Asus Sync from control panel, and keep the drivers
- Activate usb debugging in TF300
- Connect TF300 to the PC
- Unzip motochopper.zip to a folder of your choice to your PC
- Execute run.bat of motochopper. After that, your tablet will be rooted
- Execute supersu on your tablet to update binaries
- Install Voodoo OTA from market
- In Voodoo, press to backup root
- In Voodoo, press Unroot (but keep root backup)
- Update TF300 via OTA
- Do a factory reset (to have a clean installation)
- Install Supersu from market
- Execute Voodoo and press to restore root. SUCCESS!!!
- Install terminal from market
- Type in terminal:
su
cd /Removable/MicroSD/androidbrowsercached
sh install.sh
- Now you have a rooted tablet with super speed lagless browser!!!

I hope that this will help everyone that has problems with rooting his/her TF300.

 

[diofar]

i've updated my tf300t to 10.6.27.5 with out rooting it first or backing it up.
does anyone know if there is anyway to either downgrade it or root it from this new update?

Thanks..

See my previous post with a complete guide on how to do that.