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Update HTC One X to Android 4.3 using Unofficial CM 10.2 Test build ROM

The HTC One X smartphone can now be updated to Android 4.3 with an unofficial release of the CM 10.2 test build. This custom ROM can be easily flashed if you read all the instructions that I have listed in this post.

If you want to install the CM 10.2 Unofficial test build on your HTC One X, then you will first need to take a look at the preparation guide below:

  • Use this post only with the HTC One X device and don’t attempt to install the files you find in this post on any other Android device.
  • Your device has to be factory unlocked and rooted.
  • Also, you will need to use CWM or TWRP Recovery in order to flash the Unofficial CM 10.2 Android 4.3 custom ROM. Both Custom Recovery versions are supported by this guide.
  • The ‘how-to’ part of this guide will ask for you to ‘factory reset’ the device’s system partition. This will delete files such as installed apps, SMS and other similar data.
  • If you want to backup SMS, APN Internet Settings or Installed apps data, then you should use the following tools for Android: SMS backup & restore | Call Logs backup & restore | APN Settings Backup & Restore. You will have to grand root access for some of these apps.
  • Sync your Contacts with the Gmail account that you have assigned as default for your device.
  • Enable the USB Debugging option from the Developer Options menu.
  • Make sure that you phone’s battery has enough power left before completely switching off. In case the phone powers off before completing the installation of CM 10.2 Test ROM, then you will be forced to repeat the entire tutorial once again.
  • This is a guide for more advanced users who want to test the latest features of CyanogenMod 10.2 and Android 4.3. Note that we cannot be blamed in case you lose any important files or you brick your device in the process.
  • In case you cannot complete the update, then you should ask for more help in comments.

Also, note that since this is a custom ROM and a test build of CM 10.2, then not all things will work correctly, which is why you should only install it only for testing purposes. The following bugs are present in this release:

  • occasional graphic glitches.
  • Focal camera app doesn’t work correctly.
  • MHL not functional.
  • Root access might not always work for some apps.
  • Screen off animation flickers.
  • Proximity Sensor bug that doesn’t allow the display to power on during a call. Fix this by installing Rezound Prox Sensor Calibrator and play wiht the PS1_CANC slider.
  • A2DP Bluetooth errors.
  • More info about this Port of CM 10.2 for HTC One X can be found in this XDA thread here.

Now that you know all of the above continue to the next part of this post.

How to flash Unofficial CM 10.2 Android 4.3 Test ROM for the HTC One X:

  1. Download the CM 10.2 Unofficial Test ROM from here.
  2. Download Gapps zip for this particular ROM from here.
  3. Connect your device with your computer now using the USB Cable.
  4. Move both zip files on your phone’s internal SDcard. Do not unzip the archived contents.
  5. After the files are copied with success, make sure to unplug your device from your PC.
  6. Power off the smartphone now.
  7. Boot the device into HBOOT mode, then select ‘Recovery’ mode to boot the custom Recovery Mode.
  8. You need to create a NANDROID Backup file for the currently installed ROM. This will create a restore point for your device and you will be able to use in case something goes wrong and you cannot complete the installation.
    > CWM Recovery: select ‘backup and restore’ option, then Name the backup file and confirm.
    > TWRP Recovery: press Backup and then select the system files you wish to backup and confirm the process.
  9. Now you need to apply a ‘factory reset’ for your device:
    > CWM Recovery: select ‘wipe data/ factory reset’ option. Confirm.
    > TWRP Recovery: press Wipe, then System. Confirm this process by sliding the blue button at the bottom of the screen.
    – when the factory reset you can continue to the next step.
  10. Install the new custom ROM:
    > CWM Recovery: select ‘install zip from sdcard’, then ‘choose zip from sdcard’. Find the CM 10.2 Unofficial zip file and install it.
    > TWRP Recovery: Press Install, then browse the phone’s internal SDcard for the CM 10.2 zip. Load it into TWRP and confirm the installation using the blue button.
  11. When the new ROM is installed, you will need to repeat step 10 in order to flash the Gapps file too.
  12. After both zip files have been flashed with success, you need to return to the main Custom Recovery screen.
  13. Now, reboot your device into normal mode. For CWM Recovery select ‘reboot system now’ while the TWRP users should press Reboot, then System.
  14. The first boot process of the new ROM will take several minutes to complete until all the CM 10.2 files are loaded. Enter your Google Account details when the home screen appears.
  15. Now you can test the CM 10.2 Unofficial ROM and check all the new things added by the CyanogenMod team.

These were all the steps that you had to take in order to complete the installation of this new ROM for your HTC One X. In case you get stuck or the installation isn’t completed at your first step, then you should repeat the entire tutorial once again. In case you do repeat the installation, then you should make sure that you don’t skip any steps that I have listed.

If you don’t like how this new CM 10.2 Test build works with your HTC One X, then you can always choose to restore it to its previous ROM using the NANDROID Backup file created in step 8. Use the same custom Recovery Mode in order to restore the backup files.

If you have problems with the installation or you have any other questions regarding CM 10.2, then you can use the comments field for more help. Make sure to leave a detailed comment so that we will be able to come up with a viable solution for any problems you might have encountered in your quest to get Android 4.3 and CM 10.2 Unofficial ROM on your HTC One X smartphone.

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