How To

Download Asus ZenFone Max (ZC550KL) Stock Firmware, VoLTE Support

Today we’re focusing a bit on Asus ZenFone Max users, who can now install the stock firmware with VoLTE support WW 8939- The update started rolling out over the air recently, in a phase wise manner, but if you can’t wait until you will receive the official notification, you can also install it manually, by simply following the instructions below.

After flashing the Asus ZenFone Max stock firmware, you will enjoy VoLTE, as well as several fixes (especially for the LTE mobile data disconnecting randomly), updates for several apps and support for India SOS call.


Before proceeding with installation, please consider the following aspects, in order to avoid any issues:

  • This method works just for the Asus ZenFone Max (ZC550KL), version WW 8939 CPU SKU, so please don’t try installing it on another device, since it won’t work at all.
  • The update won’t erase the data on your phone, but our recommendation is to perform a full backup before starting, for the safer side.
  • Please check your battery level! It should be around 50-60%, otherwise you risk dealing with an accidental shutdown.
  • Follow the steps below correctly and make sure you don’t sky any of them!



Download Asus ZenFone Max Full Stock Firmware With VoLTE  Support


Download Asus ZenFone Max – Download



Install Stock Firmware On Asus ZenFone Max


Step 1: Download the Asus ZenFone Max stock firmware, and then, rename it to

Step 2: Turn off your Asus ZenFone Max and boot it into Recovery More, by pressing and holding the Power and the Volume Up buttons at the same time.

Step 3: While in Recovery Mode, choose the ‘Apply Update from SDcard’ option.

Step 4: Select the file you downloaded earlier.

Step 5: Wait for about 10 minutes, until the flashing process is completed.

Step 6: After the flashing is done, please reboot your phone.


And this is it! You have successfully managed to install Stock Firmware on Asus ZenFone Max manually. As you can see, the whole process is very simple, but if you have any questions or encounter difficulties, feel free to contact us, by dropping a few lines in the comments section below.

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