Asus Updated ZenFone Max (ZC550KL) with VoLTE (Installation Guide)

ZenFone Max owners can now use VoLTE (voice call over LTE) on their phone. Asus has updated Zenfone Max (ZC550KL) to software version that enables VoLTE on the device. Though ZenFone Max supports LTE, there was no VoLTE function on it until now, so users cannot use ‘phone call over LTE’ feature that some carriers offer, for example, Reliance Jio in India.

ZenFone Max users will receive the OTA (over the air) notification for the update (V13.8.26.80) on their device. Just update the device to get VoLTE. If you have not received the update notification on your ZenFone Max for some reason or facing network issue for downloading the firmware, then you can manually install the update by downloading the firmware on your computer.


In the below guide we will provide all the required information for updating your Zenfone Max (ZC550KL) to the latest version manually. Still based on Android Marshmallow, the new update includes VoLTE, update for several apps, fixes bugs and supports SOS call for India.

Important: The below guide is for Zenfone Max ZC550KL and SKU WW. Do not install the firmware on other SKU (CN, TW, etc.). Check it by going to Settings > About > software information > Build number and see the software version for WW, CN, JP, etc.

Note: Backup all data you have on the phone before proceeding, as the update process will delete data.

Manually Update ZenFone Max latest version

Disclaimer: Follow the instruction at your own risk. We will not be liable if any damage occurs to your device and/or its components.

1. Download stock firmware zip file for ZenFone Max (version from here and save the zip file on your phone’s internal storage.

2. Software update notification will pop up on your Zenfone screen. Just tap to update.


[If the above method does not helped, you may try the recovery method described below]

1. Copy and paste the downloaded firmware zip in to the SD card of the phone

2. Boot your phone into recovery mode by pressing and holding Power & Volume Up buttons after switching off the phone.

3. In recovery, select Apply update from sd card, select the firmware zip file.

4. Once the installation process finished, reboot your phone.

If you have any question regarding this update, leave it in the comment section below (source – 1, 2)

Kannan is a computer and Android enthusiast, a blogger by passion and a tech freak. His always ready-to-help attitude, knowledge and hard work is what drives him.


  1. santosh gurung

    Aug 4, 2017 at 1:46 am

    I have just done with my system update as shown above the latest one but still the things are same no changes regarding Volte. Why you people are making such commitments which can not be done. How to use the device now without Volte services? Let us know what to do and where will get it

  2. Anil raj

    Jul 27, 2017 at 12:38 am

    I have got my VOLTE updation by air. After the updation also, i didn’t got any option regarding VoLTE. What should I do?

    • Kannan

      Jul 28, 2017 at 8:16 am

      Check it in Network setting menu under SIM 1. Also check your firmware version

      • Anil raj

        Jul 28, 2017 at 5:31 pm

        I checked. After that I reset my phone and done cache partition also. After that updation i got another one also. Still i didn’t got VoLTE

        • Kannan

          Jul 29, 2017 at 7:52 am

          Check it by going to Setting > Data usage > tap Settings icon on top right corner (vertical dots) > Network Settings > Enable VoLTE. Check Zenfone Max help desk ( for other details.

        • Prasin

          Nov 12, 2017 at 4:59 pm

          Same problem broii…how do i solve this… get vo lte

      • Anil raj

        Jul 28, 2017 at 6:07 pm Now,this is my firmware version

  3. Leela

    May 19, 2017 at 7:48 pm

    After all the steps no bolts option and its showing model no:Z010DD

    • Leela

      May 19, 2017 at 7:49 pm


  4. Paomin

    Mar 30, 2017 at 4:43 pm

    I tried to update my zenfone max but it does not work, i downloaded latest version of firmware i.e ww_13.8.26.80, copy it to sd card n install but it says signature verification fail. My present firmware is ww_13.8.26.76
    What should i do?

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