[RUU] Stock FW For Desire 820U Dual Sim ASIA_INDIA

For product: a51_dtul
Download the firmware from here

Install fastboot drivers from below if not installed previously..

FastbootDrivers1 or FastbootDrivers2

Note: If using windows 8/8.1/10, make sure to disable driver signature check before installing drivers

Download fastboot tools from the attachement, extract it somewhere..

Now place the above downloaded zip inside the same folder having "fastboot.exe" and rename it to "firmware.zip"
Open command prompt onto the current folder (Shift+Right Click on the folder then select "Open Command Window here")
Boot into fastboot mode (Vol down+ Power then select fastboot)

Now type the commands as given below..

1. fastboot reboot-bootloader
2. fastboot oem lock (If Bootloader is Unlocked previously otherwise skip)
3. fastboot oem rebootRUU

wait for silver htc logo

3. fastboot flash zip firmware.zip

Now some progress bar should appear onto you phone. Wait for it to finish, after that

4. fastboot reboot

Note: If you get "Waiting for device" install drivers properly

Attached Files

Fastboot and adb.zip - [Click for QR Code] (507.3 KB)