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Download Stock Android 6.0 Marshmallow 21.40.0.1692 Firmware for the Asus Zenfone Selfie

The new Android 6.0 Marshmallow firmware is available for the Asus Zenfone Selfie. Asus finally released the Android M OTA for this device, so the new notification should embrace your phone right as we speak. However, if you are tired of waiting, you can choose to manually update your Zenfone Selfie by using the guidelines from below. During this tutorial you will also find from where to download the OTA as you might want to save it on your computer in order to use it on another situation – for example, if you will want to go back to Marshmallow after applying another Android update.

The 21.40.0.1692 firmware is coming straight from Asus and it is compatible only with the Zefone Selfie. Don’t use this particular ROM if you have a similar or a different Android powered smartphone or tablet. Also, since it is currently OTA available the software should automatically embrace your device – only if root access isn’t ensured and only if the official Android software is already running on your device (otherwise, a manual flashing process is required – in that case the full ROM package must be used and not the OTA release).

In a few words, you can use this tutorial only if your Zenfone Selfie is already running on stock Android OS. However, the best is that the flashing process can be easily completed – even by a newbie who is on his first update attempt. Furthermore, manually updating to Android 6.0 Marshmallow will be an official process so you have nothing to worry about – you can’t brick your phone, you won’t lose your phone’s warranty and you won’t have to use risky or complex programs or third party tools.

Since it is the official release of Marshmallow and since the OTA is coming from Asus, you can download the 21.40.0.1692 built by using Asus’s official website – you have the direct link here. Now you can just save the software package on your computer or on your notebook or you can resume the guidelines from below in order to learn how to manually apply the same software.

But first, make a backup. I know that you shouldn’t complete such operation when dealing with an OTA, but since you will apply things manually and since it is about everything that’s important for you I’m still recommending the backup – however, it will be unlikely to lose something while using this step by step guide. As backup and restore tips for your Asus Zenfone Selfie you can use: compatible and tested apps from Google Play, you can sync all your data with your Google Account or you can manage other built-in or third party cloud storage software.

Good; after placing your data in safe hands you must apply a few modifications / optimizations on your smartphone. Start by becoming a developer: tap on Menu, go to Settings, select About Phone and start tapping (repeatedly) 7 times on Built Number until the ‘You are a Developer’ message is displayed. Next, access the new options by going towards “menu – settings – developer options” from where check or enable the USB Debugging option. Good; now just make sure you can use a computer on where you should already have to Android 6.0 Marshmallow 21.40.0.1692 software saved.

Don’t forget to check the battery status level on your Asus Zenfone Selfie. It is important to make sure that your phone has enough power for the Android 6.0 Marshmallow 21.40.0.1692 update process. It’s important to charge your phone if the power is lower than 50% because else your handset might get turned off (suddenly) while you are still trying to apply the Marshmallow ROM. Unfortunately, if that happens you can end up with a bricked device – software problems might be issued – such as boot loops, lags, bugs, force close errors, battery drain, heating problems, screen freeze, total blackouts and so on. So, as a conclusion, avoid unpleasant situations from taking place by plugging in the charger if the battery power is currently lower than 50%.

How to Install the stock Android 6.0 Marshmallow 21.40.0.1692 Firmware on the Asus Zenfone Selfie

  1. The first thing to do: download the software package by using the link from above.
  2. Place this file on desktop and don’t unzip it.
  3. Power on your smartphone.
  4. Connect it with your computer – establish the connection by using the USB cord.
  5. Transfer the Marshmallow firmware file on your phone – in its root folder; where you have the Ringtones and the other built-in apps.
  6. When done, remove the USB cable as the computer is no longer required.
  7. Reboot your device.
  8. Up next you should be automatically prompted with the update notification.
  9. Just follow on screen prompts and wait while the Android 6.0 OS is being automatically flashed on your Asus Zenfone Selfie.
  10. During the update operation your phone should be rebooted in recovery mode; don’t press anything just sit back and relax.
  11. When done, reboot and check the firmware version by going towards “menu – settings – about phone – software version”.

That should be all. Now you can use the new Android 6.0 Marshmallow OS on your own Asus Zenfone Selfie. Enjoy and share your experience with us or with other users who might want to use this step by step guide – in that respect use the comments field from down below.

  • -G-

    i just want to say thank u! your instructions are the most accurate by far and i am now running Android M on my zenfone selfie ?

  • Vinamra

    Will my personal files and apps be lost.