Install Android 6.0 Marshmallow 3.12.401.2 firmware on HTC Desire 816 Dual Sim


HTC just started seeding Android 6.0 Marshmallow update for HTC Desire 816 Dual Sim. This device is pretty lucky to taste the Stock Marshmallow update so early even other devices are still looking for it. The update carries software version 3.12.401.2 and is packed with latest features including Doze mode, Google Now on Tap and much more.

The Marshmallow update is rolling out via OTA and will knock at your device anytime soon, you will receive one interum update with size 55MB after then the original Marshmallow firmware OTA with size 1.1GB will notify you to download. However you can also flash the firmware manually but you have to wait a while until we managed to grab the Marshmallow 3.12.401.2 firmware for you. So till then just go ahead and check the Over The Air update by following the below mentioned procedure.


How to update HTC Desire 816 Dual Sim to Android 6.0 Marshmallow 3.12.401.2 firmware

This is the first and preferably the most easiest method to update your device, you can use your device to download the firmware file if available and then the device will ask you to install the updates now or later. To check whether your device is eligible for OTA Firmware update, unlock your device & navigate to

Settings >> About device >> Software update >> Check for updates

This will require a working internet connection to connect to the servers. You will receive a notification about the latest firmware availability click install to flash the firmware or tap install later to flash the latest update anytime later.

Note: The Android 6.0 Marshmallow 3.12.401.2 firmware for HTC Desire 816 Dual Sim update link will soon be available as a flashable file and there you will be able to install it manually, this method would be helpful if you are not getting the OTA notification so stay connected.

That’s it! If you have successfully updated your HTC Desire 816 Dual Sim on 3.12.401.2 firmware via OTA, let us know or if you have any query contact us by posting your opinion in the below provided comment box.

A Software Engineer who loves to hang around latest gadgets and writes his own experiences to get the best possible and accurate information.
  1. Reply n. anjaneya murthy March 28, 2016 at 9:51 am

    htc desire 816 dual sim is of two types 1. dual sim with exclusively both sims as gsm without supporting cdma 800 2. one sim out of two could be the non cdma 800 or cdma 800 and the second sim is gsm. which of these is supported by update 3.12.401.2.
    further my htc desire 816 dual sim with cdma 800mhz has received notification for downloading and installing ver. 3.14.720.1 but after giving ok is unable to download and showing “downloading 0% for the last 7 days. why? kindly clarify.

    • Reply Alee March 28, 2016 at 6:13 pm

      its specifically for the desire 816 dual sim variant

    • Reply Mayank May 17, 2016 at 2:22 am

      Facing the same problem…plz reply

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