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How to Install Cyanogenmod 9 (CM9) on Asus Transformer TF300T


It’s been an active two days for the Asus Transformer TF300T. After seeing the release of ClockworkMod recovery for it by XDA Recognized Developer XpLoDWilD, the first custom ROM is now out for the TF300T, and its none other than the king of all custom ROMs — CyanogenMod 9 (CM9). CM9 is based on Android 4.0.4 Ice Cream Sandwich, and brings fast performance, along with lots of customization options so that you can personalize the ROM as you see fit.

However, since CM9 is in its development stages, there can be things that don’t work properly or don’t work at all, along with other bugs and issues, which will get fixed as development goes on. The known issues in the ROM as of the time of this guide are as listed below, and the most recent list of issues can be seen at the official development page (linked in step 3 of the guide below).

  • MTP is broken (cannot pull file from device to computer, but pushing from computer to device work fine)
  • Camera doesn’t work

So let’s see how CM9 can be installed on the Asus Transformer TF300T.


This guide is applicable only for Asus Transformer TF300T. DO NOT try this on any other device.


The methods and procedures discussed here are considered risky and you should not attempt anything if you don’t know completely what it is. If any damage occurs to your device, we won’t be held liable.

How to Install CM9 on Asus Transformer TF300T


  1. This procedure will wipe all your apps, data and settings (but it will NOT touch your SD cards, so don’t worry about those). Backup your Apps and important data — bookmarks, contacts, SMS, APNs (internet settings), etc. This Android backup guide would help you.
    Important! Don’t forget to at least make a backup of your APN settings, which you can restore later if your data connection does not work after installing the ROM. Use the backup guide to find out how.
  2. Install ClockworkMod recovery using the guide → here.
  3. Download the latest version of the ROM from the official development page.
  4. Download the Google Apps package. This will install apps like Market, Gmail, etc. which are not present in the ROM.
    Download Gapps  |  Filename: 
  5. Copy the downloaded zip files from step 3 and step 4 to the internal SD card.
  6. Shut down the tablet. Then boot into CWM recovery. To do that, press and hold Volume Down + Power, until a message appears on-screen saying “Press Vol. Up to enter RCK (5s)”. Here, in less than 5 seconds, press the Volume Up button to enter CWM recovery.
    In recovery, use the volume buttons to navigate/scroll and the power button to select. If the buttons don’t work, scroll up and down by swiping up and down on the screen, and select options by tapping on them.
  7. Perform a Nandroid Backup of your existing ROM, so that you can always restore it from recovery if something does not work out with this rom. To perform a backup, select Backup and Restore –> On the next screen, select Backup again. Go back to main recovery menu after backup is complete.
  8. Select wipe data/factory reset, then select Yes on next screen to confirm. Wait a while till the data wipe is complete (this will not erase your personal files).
  9. Now select install zip from sdcard, then select choose zip from sdcard. Scroll to the ROM file on the sdcard and select it.
  10. Confirm installation by selecting Yes – Install on the next screen. The ROM will start installing.
  11. After ROM installation completes, select choose zip from sdcard again, then select the file to install the Google apps package.
  12. After the installation is complete, select go back and then select reboot system now to reboot your tablet and boot into CM9.
  13. Important! If you do not like CM9 for some reason and want to go back to your previous ROM, turn off the tablet and boot into recovery as given in step 6. Then, select backup and restore, then select restore. Then press the power button again to start restoring your previous ROM. Once restore is complete, go back and reboot the tablet to boot up into your previous ROM.

CM9 is now installed on your Asus Transformer TF300T. Visit the official development page for more info and to get the latest updates on the ROM. Share your thoughts on the ROM in the comments below.

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