We are thankfully now looking at some stable Android 7.1.1 Nougat based custom ROMs. If you have been looking for a ROM for your HTC One M9, Slim7 is now available for the device. Offering improved battery life and stable performance, here is how to flash Slim7 Android 7.1.1 Nougat ROM on your HTC One M9.

Prerequisites toupdate HTC One M9 to Android 7.1.1 Nougat Slim7

Backup any important datafrom your HTC One M9 as a complete wipe will be required during the flashing process.Install USB drivers for your HTC device. Check outthis link.Enable USB debugging option on your device:Settings>DevelopmentOptions>USB debugging.Ensure that yourHTC One M9's boot loader is unlockedand that you have arecovery toollikeTWRPor CWM.Your device must be charged to at least 80% of power.

Steps to update HTC One M9 to Android 7.1.1 Slim7

Required files:Download Slim7custom ROMfor HTC One M9. Extract the boot.img file. Also, download theGAppspackage for your device.

Step-1:Connect your HTC One M9 to your computer using a USB cable and copy the ROM and GApps zip filesto your phone’s SD card root folder.

Step-2:Copy and paste the boot.img file to theAndroid-sdk-windows\platform-toolsdirectory.

Step-3:Disconnect theUSBcord andpower off your HTC device.

Step-4:Boot your device in the Bootloader / Fastboot mode by pressing and holding theVolume DownandPowerkeys.

Step-5:Once in the Fastboot mode, navigate toandroid-sdk-windows\platform-toolsdirectory on your computer and open command prompt withShift + Right-clickcombo and click on theOpen Command Prompt.

Step-6:Type the following string into the window:

fastboot flash boot boot.imgand press Enter.Fastboot reboot-press Enter again.

Step-7:Follow the on-screen instructions and selectBootloader> go toRecovery.

Step-8:Once in recovery, perform wipe data task: from the CWM recovery menu, selectwipe data / factory resetand confirm the process.

Step-9:Also performwipe cache partitionfollowed bywipe dalvik cache(from Advanced).

Step-10:From recovery main menu, selectinstall zip fromsdcardfollowed bychoose zip from sdcard.Locate Slim7 Android 7.1.1 custom ROM file and confirm the flashing process.

Step-11:Once the ROM is flashed successfully, repeat the above step, but select GApps package this time.

Step-12:Return back to main recovery menu and reboot yourHTC One M9 into the new custom ROM. First boot takes a good 5 minutes so please be patient.

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