ROM Update Utility (RUU) lets users to update their Android based HTC devices manually. Samsung Kies is the recommended process to update your HTC device, but if due to some reason you are unable to do so then you can proceed with the manual installation by using RUU.

Those looking to update your HTC device with RUU may check this tutorial. IBTimes UK reminds its readers it will not be held responsible for any damage to the device during installation.


  • Ensure the device has a minimum 80 percent battery charge
  • Make sure the USB driver is installed in your PC
  • Enable USB debugging
  • Install Android SDK and ensure the bootloader is unlocked

To update HTC Android smartphone via RUU:

  • Find and download RUU for your HTC device and connect the device to PC using USB cable
  • Double-click on RUU file to begin the process. Now, follow onscreen instructions to complete the update process

Your device will now be updated to the latest firmware version. In case the RUU.exe does not work then you should manually collect the ROM zip, rename it and then flash it using stock or custom recovery. If both recovery do not work then you need to flash the file using Fastboot command.

To do so, perform the following steps.

To manually collect firmware update zip from RUU:

  • Run the RUU exe file
  • Paste the following on your Windows Explorer navigation bar

C:Documents and Settings%USERNAME%Local SettingsTemp [for Windows XP]

  • If you are using the newer version of Windows press Windows key and R. Now, type %temp%
  • Right-click anywhere inside explorer window and choose Sort by then select Date
  • Copy the ROM zip file and rename it to appropriate update build

To flash stock firmware ROM on HTC device using bootloader:

  • Connect the HTC device to PC and copy the renamed ROM zip to root
  • Reboot the device to bootloader by holding Volume Down and Power buttons
  • After installation, you will be asked to reboot the device (to do so, open back case and remove the SD card)
  • Press Power button to reboot
  • If booted into bootloader, choose fastboot > reboot. If booted into fastboot, choose reboot
  • Connect the SD card to PC and delete the ROM zip file

To flash stock firmware ROM on HTC device using Fastboot flash:

  • Reboot the device into bootloader and connect the device to PC
  • Navigate to the platform tools folder and copy the ROM zip file to android-sdk folder
  • Right-click inside the window and choose Open command window
  • In command window, enter the following commands:
    • fastboot erase cache
    • fastboot oem rebootRUU
  • Your device will get into RUU mode. Now, enter fastboot flash zip
  • Installation will begin. Once completed, enter the following command: fastboot reboot

[Source: Android Jinn]