How To Update HTC One (M9) To Slim7 Android 7.1.1 Nougat Custom ROM

If you’re looking for a custom ROM for your HTC One (M9) based on the latest Android 7.1.1 Nougat, then you are in the right place. The Slim7 is a new custom ROM for HTC One (M9) that supports Android 7.1.1 Nougat. Now HTC One (M9) user can taste the sweetness of Nougat and experience all the new features of Nougat right on your HTC One M9 with Slim7 custom firmware. This latest custom ROM is very stable, smooth and fast. Also, Slim7 custom firmware brings some great after market features and brilliant performance with amazing battery life as well. This ROM is not officially announced by HTC but just a custom ROM. Your HTC One (M9) should be rooted and installed with the latest custom recovery like TWRP or CWM. Slim7 custom firmware Android 7.1.1 Nougat will need a custom recovery to be installed on your HTC One (M9).

By following this step by step guide, you can install Slim7 custom firmware Android 7.1.1 Nougat on your HTC One (M9). This amazing Sllim7 custom ROM comes with tons of new features like Single tap action, long press action, double tap action, Customize your device to the fullest, a faster alternative to stock recants, an open source, feature filled launcher and much more. Before proceeding, keep in mind to take a full backup of all your valuable data. If you are interested in updating your HTC One (M9) to Slim7 custom firmware Android 7.1.1 Nougat then go ahead and follow the given steps.



This guide containing the Slim7 Android 7.1.1 Nougat custom ROM is working with the HTC One (M9). Do not try to install this ROM on any other device, or your device might get bricked.


AndroidBlog will not be held responsible for any damage occurred to your HTC One (M9) during or after the installation of Slim7 Custom Firmware. Proceed at your risk.


  • Make sure that the battery level of your HTC One (M9) is at least about 80% before proceeding to the installation guide.
  • Download and install proper USB Drivers for the One (M9) on PC.
  • It is highly recommended to take a good backup of your important data and settings on the phone using a custom recovery such as CWM or TWRP. In case anything goes wrong then you’ll be able to restore your data.
  • Enable USB Debugging Mode on One (M9) from Settings > Developer Options.
  • The HTC One (M9) should be rooted with the latest version of CWM or TWRP recovery installed that it supports the new Android 7.1.1 Nougat-based ROM installations.

Required Files:

Steps to Update HTC One (M9) to Slim7 Android 7.1.1 Nougat Custom ROM:

Step No 1: – First, download the Slim7 Android 7.1.1 Nougat custom ROM ( and Google Apps package from the above links on the desktop of your PC. Do not extract these files.

Step No 2: – Now, connect your HTC One (M9) to the PC using its USB data cable.

Step No 3: – Move the Slim7 firmware, and Google Apps zipped files to the root folder of SD card on your phone.

Step No 4: – Transfer the boot.img file to android-sdk-windows\platform-tools directory on your PC.

Step No 5: – Next, power OFF the HTC M9 to boot into Bootloader/Fastboot Mode. Also, disconnect the USB cable.

Step No 6: – Power ON the device while pressing and holding the Volume Down + Power buttons at the same time.

Step No 7: – Once your M9 is in the Fastboot mode, navigate to android-sdk-windows\platform-tools directory and open Command Prompt within the folder.

Step No 8: – Type the following command and press Enter.

How To Update HTC One (M9) To Slim7 Android 7.1.1 Nougat Custom ROM 1

9: – Now, type the following command and hit Enter.

How To Update HTC One (M9) To Slim7 Android 7.1.1 Nougat Custom ROM 2

Step No 10: – Follow the on-screen instructions and choose BOOTLOADER -> RECOVERY.

Step No 11: – While the phone is in TWRP Recovery, perform a full data wipe by tapping on the ‘Wipe’ button. Then swipe on the “Swipe to Factory Reset” option at the bottom.

Step No 12: – Navigate to the Recovery main menu and tap on the ‘Install’ button. Select the firmware.ZIP file that you have already transferred to the root folder of your SD Card on the phone.

Step No 13: –  Swipe on the “Swipe to Confirm Flash” option to confirm installation on the next screen. The installation process will be initiated.

Step No 14: – After the installation is finished successfully, you will see a similar screen like the following:

TWRP Recovery

Step No 15: – Repeat the above-given step for the installation of Google Apps package on your HTC One M9.

Step No 16: – Finally, select the “Reboot System” button to reboot your phone.

Your HTC One M9 will boot now, and it may take about 4-5 minutes to boot for the first time after installation.

Done! You have installed Android 7.1.1 Slim7 Nougat custom ROM on HTC One M9.

Bhatti Junaid

He continuously writes tech articles and development code. Also, appreciates excellent food, exceptional coffee and great company. He has written 266 guides and other posts.

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