WW-15.0400.1901.504: Download Asus ZenFone 4 Selfie Firmware Update (FOTA)

Asus ZenFone 4 Selfie WW-15.0400.1901.504 software update has been rolled out by the company in some region. The Update is only for the device with model number ZB553KL / ZD553KL. Asus is officially rolling out Oreo firmware update via OTA. Here, we are providing a direct link to download Asus ZenFone 4 Selfie Oreo firmware update having version number WW-15.0400.1901.504.

The update will bring the latest security patch to the device. The Update also carries some major bug fixes to improve security and user experience. The update also brings some new optimization to improve the camera performance of the device. It is now rolling out as a FOTA (Firmware-Over-the-air) Update. The available full firmware file name is UL-ASUS_X00LD_1-WW-15.0400.1901.504-user.zip and it is around 1.61 GB in size.

About ZenFone 4 Selfie WW-15.0400.1901.504 Update

The OTA has been rolled out in some regions and only available for ZenFone 4 Selfie ZB553KL / ZD553KL users. This update comes with anew security patch. The update comes with build number 15.0400.1901.504. If you are using the device then you may have received the OTA update notification on your device if not then wait for few days for the update to come or you can download the full firmware (FOTA) file and install it manually by following the guide given below.

  • Device Name: ZenFone 4 Selfie
  • Model: ZB553KL / ZD553KL
  • Region: Unknown
  • Android version: Android 8.1 Oreo


We at rootmygalaxy.net will not be responsible for any damage that might occur to your device in case something goes wrong. So, proceed at your own risk. Make sure you are following the guide properly.


  1. First, go to Settings>About>System Update> Check for Update. Check if the OTA is available or not. If available take the update. Else, follow the following steps.
  2. This method is applicable only for Asus ZenFone 4 Selfie (ZE520KL) For WW SKU.
  3. Take a full backup of data because everything will be erased in the process.
  4. Make sure that the battery has at least 60% charge to prevent accidental shut down.
  5. Make sure there is at least 2GB of free space available on your device.

Download FOTA Update

  • Download Asus ZenFone 4 Selfie 15.0400.1901.504 Full Firmware (Official Site)

How to Install Asus ZenFone 4 Selfie WW-15.0400.1901.504 Update (Manual Guide)

WW-15.0400.1901.504: Download Asus ZenFone 4 Selfie Firmware Update

  • Method 1

Step 1. Download the files from the download section and rename it as update.zip and transfer to your SDcard.

Step 2. Turn off your smartphone and boot into recovery mode by pressing Power + Volume Up buttons together.

Step 3. Once in the recovery mode, select the option ‘Apply update from SDcard’.

Step 4. Then browse and select update.zip file that you transferred.

It will take some time and then reboot the phone.

  • Method 2

Step 1. Enable USB Debugging mode from Settings> Developer Options. To enable Developer Options, you have to go to Settings> About Phone and tap on the Build Number 7 times continuously.

Step 2. Download ADB and Fastboot driver for your Windows or Download ADB and Fastboot driver for your Mac and install it.

Step 3. Download the Full firmware and rename it to update.zip and copy it to the ADB folder.

Step 4. Turn off your phone and boot into recovery boot by pressing Power + Volume up buttons simultaneously.

Step 5. Choose the option “Apply update from ADB’ and connect your device to your computer.

Step 6. Go inside ADB folder on your computer, press shift and right-click to open the command prompt. Type the following command –

adb devices

This should list your device and ensure it is connected.

Step 7. Type the following to flash the OREO firmware –

adb sideload update.zip

Wait for the process to complete and then disconnect and reboot your device.

Dibyashree Sharma
Dibyashree Sharma
Dibyashree Sharma graduated in Computer Science from NIT Rourkela. For the past eight years, she has been blogging about Android, which she is really passionate about. She has built a good reputation as a reliable source. Away from the digital sphere, Dibyashree enjoys playing tennis, a sport she is as passionate about as she is about technology.

Leave a Comment