It sure is raining custom Jelly Bean updates everywhere, with more and more devices being added to the list. One of the latest devices to get its share of custom Jelly Bean ROMs is the Asus Transformer Prime TF201, and this time around, it comes from Team EOS, a development team that has already done a lot of custom ROMs.

The EOS 3 custom ROM brings a lot of enhancements to the table and promises to put the Transformer Prime on the next level, thanks to its new features like a smoother interface, improved notification area and a better stock keyboard, just to name a few.

If you own a Transformer Prime and want to update it to Android 4.1 Jelly Bean then this is your chance. Check out our guide below for the complete details on how to upgrade the Transformer Prime TF201 to Android 4.1.1 Jelly Bean via the EOS 3 custom ROM.

Warning

• The instructions in this guide are intended for use with the ASUS Eee Pad Transformer Prime, model number TF201.  Applying these instructions on another device or model may produce undesired outcomes.
• The information in this guide is provided for instructional and educational purposes only. There is no guarantee that these instructions will work under your specific and unique circumstances.
• Use these instructions at your own risk. We shall not hold any responsibility or liability for whatever happens to you or your device arising from your use of the info in this guide.
• Read and understand the whole guide first before actually performing the instructions.

Requirements

• ASUS Eee Pad Transformer Prime TF201 with ClockworkMod Recovery installed
  • You can check our guide on how to flash the ClockworkMod Touch Recovery on your Android tablet.
• Fully charged battery or at least 70% battery left.
• Download the following files to your computer:
  • Team EOS Android 4.1 Jelly Bean ROM (EOS-tf201-20120724-29.zip, md5sum: c3179f6e9e0132fce180dde21299f233)
  • Google Apps package (gapps-jb-20120722-eos-signed.zip, md5sum: 6bd1356e50cac814791d4f8621d96c1a)
• Backup all personal data on your phone to make sure you have a copy of your personal data (e.g., contacts, SMS, MMS, Internet settings, Wi-Fi passwords, and the like) in case the procedure in this guide erases such data.
  • For backup tips, check our guides on how to sync your data to the cloud and how to create local backups of your mobile data.

Instructions

1. Copy EOS-tf201-20120724-29.zip and gapps-jb-20120722-eos-signed.zipto the tablet's internal SD card.
2. Turn off your tablet.
3. Boot into ClockworkMod Recovery. You can do this by pressing and holding down the Volume Down and Power buttons until you receive a message with a couple of lines on the screen. Within 5 seconds, press the Volume Up button to enter ClockworkMod Recovery.
4. Create a NANDroid backup of your existing ROM. If ever there is something that doesn’t work with this ROM, you can easily revert to the previous ROM. To perform a backup, select Backup and Restore, and on the next screen select Backup. Head back to the main recovery menu after backup is complete.
5. Select Wipe Data/Factory Reset, then select Yes on the screen that follows to confirm data wipe.
6. Select Wipe Cache Partitionand confirm the action on the next screen.
7. Go back to the main menu and select Advanced.From there, select Wipe Dalvik Cacheand confirm the action on the next screen.
8. Return to the main menu and select Install ZIP From SD Card.  Select Choose ZIP From SD Card, then browse for the downloaded EOS-tf201-20120724-29.zip file and select it. Confirm the installation process by selecting Yes on the screen that follows.
9. Go back to the main menu and flash the gapps-jb-20120722-eos-signed.zip file in the same manner as in step 8.
10. After the installation is complete, head back to the main recovery menu by selecting Go Back.
11. Reboot your tablet by selecting Reboot System Now.

Setting up offline voice recognition feature

1. After complete boot, head to Settings > Language & Input.
2. Scroll down to “Speech” and select Voice Search.
3. Select Download offline speech recognition.
4. Swipe Across to the ALL tab if needed.
5. Download the speech pack depending on your language.

Congratulations! You have successfully installed the EOS 3 custom ROM based on Android 4.1.1 Jelly Bean on your ASUS Eee Pad Transformer Prime TF201.