How to Reinstall Stock Android 8.0 Oreo Firmware on HTC U11

The full Android 8.0 Oreo firmware package is available for the HTC U11. The update file can be downloaded and then manually flashed, which means that you can now reinstall the stock OS anytime you need to. The reasons why you might have to complete this installation process are described below, where you will also review the downsides implied by this process along with the essential pre-requisites and the actual steps that must be followed in order to apply the stock Oreo ROM on your own HTC U11.

You can use this tutorial if you haven’t received the Oreo OTA until now – you can skip the OTA wait by installing the full Android 8.0 Oreo package. Additionally, using the full firmware file is required if your HTC U11is rooted or running on a custom ROM firmware, situation during which the OTA cannot be received – shortly, if your phone was tweaked you can update to stock Android OS only by following a manual update operation.

Moreover, the steps from below can also help you restore your smartphone back to its initial state meaning that you can revoke any tweaks that were previously applied. In a few words, if needed, you can now revoke root access, relock the bootloader, reinstall the stock recovery image and re-flash the built-in apps and restrictions. Thus, you can restore the warranty on your HTC U11 – as you might know, the warranty usually gets void when you decide to complete custom operations such as the processes mentioned above.

Restoring everything back to the default state might help you smartly resolve other problems. For example, reinstalling the stock Android 8.0 Oreo software can help you successfully address the most common Android software related issues. Basically, the installation process will remove malware, inappropriate apps, malicious features and will stop the unresponsive processes that are running in the background. So, as a general conclusion you can also use the steps from below for fixing malfunctions like boot loops, lags, bugs, hangs, screen freeze errors, battery drain, heating issues, signal strength problems, total blackouts and so on.

Of course, you should be careful as during the flashing process your data might get corrupted or wiped out. Therefore, if you know that you have important files saved on your HTC U11, before doing anything else, complete a general backup operation – secure stuffs like contacts, call logs, texts, images, videos, audio files, market apps, internet settings, calendar info, EFS folder, IMEI / NVRAM data and so on. You can easily and quickly initiate a backup by using backup and restore apps from Google Play, you can sync your files with your Google Account or you can just use built-in cloud storage platforms.

Note: if a custom recovery image is running on your phone you can also make a Nandroid backup – that process will save the Android OS which means that you can afterwards reinstall it if that’s needed.

Of course, the stock Android 8.0 Oreo firmware will smoothly run on your HTC U11. Everything is fully stable, so from this perspective you have nothing to worry about – you can safely use the full firmware package on a daily basis without experiencing any soft related problems.

Now, for the steps described below you will have to use a computer, your smartphone and its USB cable. On your computer install the HTC U11 drivers and the Android SDK toolkit: learn how to install Android SDK on Windows or how to set up ADB on MAC OS X / Linux. Afterwards, on your phone enable Developer Options – you can do it by tapping repeatedly on Built Number until the ‘you are a developer’ message is displayed. Also, on your phone, from Developer Options (located within Menu – > Settings) go ahead and check the USB Debugging option.

Don’t forget to charge your HTC U11 before installing the stock Android 8.0 Oreo firmware. Since we are talking about a manual operation you need to ensure a minimum of 50% power on your handset. If the power left is currently lower than this threshold you might end up in soft bricking your device – different issues might be caused within the Android core system if your phone will get stuck in the middle of the process described below. Thus, plug in the charger in order to avoid any other problems.

This tutorial is possible thanks to XDA senior member, 5m4r7ph0n36uru. We must thank him for the firmware packages available for the HTC U11.

How to Reinstall Stock Android 8.0 Oreo Firmware on HTC U11

First, go to this page. From there you can download the RUU package or the Nandroid backup file for your HTC U11 – choose the update method that you prefer the most.

Use RUU method

  1. First of all, download the RUU file for your device and save the file on your computer – you can save it on desktop.
  2. Switch off your phone. Wait while the shut down process is completed and then go to download mode: press and hold the Volume Down and Power buttons for a few seconds.
  3. When download mode is displayed connect your HTC U11 with your computer via USB cable.
  4. Open a cmd window from the Android SDK folder: press and hold the Shift keyboard key, right click on any blank space and choose ‘open command prompt window here’.
  5. Inside the cmd window first type ‘fastboot getvar all’ and press Enter.
  6. Note down the string that will be returned.
  7. Rename the RUU file into ‘’ and transfer it to the main directory on your phone’s SD card.
  8. Reboot to download mode again; this time the zip file will be automatically select for the flashing process.
  9. Press Volume Up once in order to confirm the installation procedure.
  10. Android 8.0 Oreo will be flashed on your HTC U11; when done, reboot your device and enjoy.

Use the Nandroid backup file

  1. Download the Andoid 8.0 Oreo Nandroid package and save it on desktop.
  2. On your HTC U11 a custom recovery image must be installed or else this update operation cannot be completed.
  3. Connect your HTC U11 with your computer with the help of the USB cord.
  4. Transfer the Nandroid backup package inside your device’s TWRP backup folder.
  5. Unplug the USB cable and power off your smartphone.
  6. Next, reboot recovery mode on your handset: press and hold the Volume Down and Power buttons until the TWRP logo is displayed.
  7. From recovery tap on the Restore option and pick up the Nandroid backup package.
  8. The installation process will be automatically completed.
  9. That’s all; reboot your HTC U11 when done and enjoy.


Good; so you can now successfully reinstall the stock Android 8.0 Oreo firmware on your HTC U11. Follow the steps from above and apply the latest official OS on your device – if you have questions or need further assistance, use the comments field from below and get in touch with us and with the other users who might rely on your own experience.

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