Upgrade the AT&T One X to prerooted Android 4.0.4 build 2.23.707.2

 


A new update has already been rolled out to the AT&T One X, bringing the phone’s OS version to Android 4.0.4 Ice Cream Sandwich via the software upgrade to version 2.23.707.2.
The said new update promises to boost your phone’s performance and stability compared to the previous Android 4.0.3 version. XDA Developers member scrosler has managed to release the update in the form of a flashable ZIP file which is completely safe to use.

For those users who can’t update their phone via OTA, flashing the ROM manually will be your best alternative. However, you need to have an unlocked bootloader for this to work properly.  The ROM is already pre-rooted, so you don’t need to root it again after upgrading.  This is stock firmware, too — with no mods, hacks, or tweaks.  You can also choose between an odexed or a deodexed package.
In this guide, learn how to upgrade the AT&T One X to prerooted Android 4.0.4 build 2.23.707.2.

Warning

• The instructions in this guide are intended for use with the AT&T HTC One X. 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

• Rooted AT&T One X with unlocked bootloader and ClockworkMod Recovery installed. Need help with rooting, and unlocking your phone’s bootloader?
• Download the following files:
  • Download your preferred version of the stock ROM update: 
    • Odexed version (Stock Root – 2.23.707.2 – Odex.zip , md5sum: B7AACE123A24585721683B0B98574EF7)
    • De-odexed version (Stock Root – 2.23.707.2 – De-Odex.zip , md5sum: CE236D4934BBCAA11C8C0271840F1B78)
  • APN settings file (ATT APN.zip, 12.2 MB)
• Fully charged battery or at least 70% battery left.
• 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.

Instructions

1. Copy the downloaded ZIP files and place them on your phone’s internal SD card.
2. Switch off your phone.
3. Boot into Recovery Mode. You can do this by pressing and holding down the Volume Down button while powering on your phone into Bootloader Mode.
4. From the bootloader menu, use the Volume buttons to highlight Recovery and select it using the Power button to boot into Recovery Mode.
5. Select Install ZIP from SD card.
6. Select Choose ZIP from SD card then browse for the downloaded ROM and select it. Confirm the installation by selecting Yes on the screen that follows. It may take 5-10 minutes for the ROM to finish installing.
7. After the ROM is finished installing, repeat this step but this time around, select the ATT APN.zip package.
8. After the installation process is finished, head back to the main menu by selecting Go back.
9. Reboot your phone by selecting Reboot system now.

Congratulations! You have successfully installed software update 2.23.702.2 to your AT&T One X, upgrading your phone to Android 4.0.4 Ice Cream Sandwich.