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Update HTC One with Official CM10.2 Android 4.3 Custom ROM

HTC One is one of the most highly appreciated Android based smartphone out there. The One along with the Galaxy S4 and Sony Xperia Z are also high end devices that are coming with impressive performances though the Android version that is running on these devices is not the latest one. But, since we are talking about HTC’s flagship, you can anytime choose to update your One with a custom ROM firmware. As you know, there are Android 4.4 KitKat ROMs already available for your handset, but since all the firmwares are still buggy, you may rather choose a stable software such as the official release of CM10.2 Android 4.3 platform.

Until now CM10.2 has been made available only for the AT&T HTC One but now thanks to the Cyanogenmod team you can safely flash this custom Android 4.3 firmware on all the variants of the mentioned smartphone. As you can already tell, this version of CM10.2 is stable and comes without bugs, issues or things that aren’t working properly. As usual, Cyanogenmod is a great platform that runs fast and that comes with important features, apps and capabilities that cannot be found on the default variant of Android OS.

If I manage to arouse your attention, then stick to this tutorial, because during the guidelines from below we will be checking on how to update your HTC One with CM10.2 Android 4.3 Jelly Bean custom ROM firmware. But if you rather prefer to test the new Android 4.4 KitKat system on your own HTC One then you can anytime use our “how to update HTC One” section as you will have suitable step by step guides explained there.

As already mentioned the CM10.2 system is based on stock Android 4.3 firmware. In fact, Cyanogenmod is a free aftermarket distribution of Android OS, so we are dealing with an unofficial update that has nothing to do with Google or with HTC. CM10.2 is being developed by third party devs, the purpose being in providing a more suitable OS that can fit better on your Android based device. That’s why, when using CM10.2 Android 4.3 on your HTC One you will be able to enjoy an upgraded battery life, receive improved speeds and use better performances. Furthermore, with CM10.2 you will get a custom version of Jelly Bean, which will act and look different than the stock Android 4.3 firmware.

The best is that we are having the official release of CM10.2 and not a custom port of the same. So, this update is coming from the Cyanogenmod team as the Android 4.3 firmware has been optimized especially for your HTC One. But for being able to complete this step by step guide, you will first have to take care of some pre requisites. These pre requisites are essential as without applying them you will not be able to install CM10.2 Android 4.3 on HTC One, or worst you can end up in bricking your phone while trying to do the same.

The first thing to do is to root your HTC One, if root access hasn’t been gained before. You need to unchain the system of your phone because a custom ROM can be installed only on the same. The firmware will have to access and use some internal files and programs that are in-built on your device and this access can be granted only via root. Good; so you know why root access is being required. What you might not know is that when rooting the warranty of your One is getting void. Unfortunately this can’t be avoided, so you better be careful when performing the operation as you don’t want to brick your handset while the warranty is lost.

On the other hand, as soon as you reset the flash counter of your HTC One, the warranty will be restored. For achieving the same you will have to downgrade your phone to stock Jelly Bean OS, or to update with official Android 4.4 KitKat firmware. Be aware, because on rooted handsets the OTA releases can’t be spotted; you will have to manually flash official Android 4.4 on your HTC One.

After gaining root access, you attention should concentrate upon another operation. This time you will have to install a custom recovery image on your device. As you know, when you first buy your Android based HTC One it will be delivered with a stock recovery, which unfortunately can’t be used when applying a custom ROM like CM10.2. That’s why you have to install CWM recovery or any other custom recovery tool on your phone – I have mentioned CWM recovery because you can get the same via Google Play (root access must be achieved though).

Since all these are unofficial procedures, including the present tutorial, before applying the same you need to backup the data of your HTC One. You see, when updating with CM10.2 Android 4.3 firmware a wipe is being required; becsaue of that all of your data, personal info, accounts and everything else that is saved on the internal storage memory will either get corrupted or erased. So, save what’s important for you by making a complete backup procedure. Don’t forget to save the current ROM on your way as who knows, maybe you will want it back.

Also, since this is a manual update operation, for being able to safely complete the flashing procedure which will be detailed below, you first have to ensure that you can use a computer, your HTC One and the phone’s official USB cable. On the computer and device there should be security tools installed as these programs might interrupt the update operations – disable the antivirus programs before resuming the proper tutorial. From “menu -> settings -> developer options” enable the USB debugging option on your HTC One – else you won’t be able to establish a connection between your handset and your computer. Also, charge your device (if the battery level is below 50%) because the installation procedure will take a few minutes and you don’t want to brick your smartphone (that could happen if the One gets turned off in the middle of the update operation).

Good; that should be all for now; so you can safely go to the proper steps which will take you through the CM10.2 Android 4.3 installation. Just remember first that this tutorial is compatible and will work on for the HTC One users. Try not to mess things up and follow the steps from below.

How to Update HTC One with Official CM10.2 Android 4.3 Custom ROM Firmware

  1. The CM10.2 firmware file can be downloaded from here.
  2. Similar, Google Apps package can be downloaded from this page.
  3. Save both files on your computer – on desktop.
  4. Unzip the files and then proceed to the next steps.
  5. Connect your HTC One with your computer.
  6. In order to establish the connection use the USB cable.
  7. Take the downloaded files (the unzipped ones) from desktop and transfer the same on your phone’s SD card.
  8. Then unplug the USB cord.
  9. Up next, turn off your phone as the recovery mode must be entered.
  10. Learn how to boot in recovery mode by using our dedicated tutorial.
  11. From recovery wipe the system and clear the cache; do that by selecting “wipe data factory reset” and “wipe cache partition”.
  12. Return and choose “advance” followed by “wipe dalvick cache”.
  13. Go back to main menu of recovery and pick “install zip from SD card” and “choose zip from SD card”.
  14. Take the CM10.2 update file and flash it on your smartphone.
  15. Similar, do the same for flashing the Google Apps package.
  16. Wait while the files are being installed.
  17. In the end, from recovery go to main menu and select “reboot system now”.

Now, in some cases – rare ones – after rebooting your HTC One you might experience a boot loop; for resolving this issues you need to go back to recovery and from there you need to select “wipe data factory reset” and “wipe cache partition”. Reboot and you are done. Do note that if the first boot will take longer to complete than usual, you just have to wait as there is nothing wrong with your device.

Also, use the recovery menu if you don’t like the new Android 4.3 CM10.2 platform. If you have made a Nandroid backup, as indicated before, you will be able to use the “backup / restore” option for restoring your HTC One to stock Android OS. For resolving any other problem, use this dedicated step by step guide which will easily take you through a troubleshooting process.

Good job; you have successfully applied our tutorial, which means that now you know how to update your HTC One with CM10.2 Android 4.3 custom ROM firmware. I recommend you to test the new software as you need to see if there are bugs (there shouldn’t be any) or thongs that aren’t working properly. Anyway, in the end don’t forget to share your experience with us by using the comments area from below.

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