Q1. My phone got stuck during an automatic update and is now in a bootloop. Will this fix it?

Yes, this is the perfect solution for that problem. A failed OTA is a very common issue. Manually flashing the full OTA package via ADB sideload will correctly and completely install the update, fixing the bootloop.

Q2. Will using this OTA file erase my personal data?

If you are simply sideloading the same or a newer version over a working system, it typically will not erase your personal data (photos, apps, etc.). However, if you are flashing to fix a problem like a bootloop, it is highly recommended to perform a “Wipe data/factory reset” from the recovery menu after the flash is complete, which will erase your data.

Q3. The front camera on my Selfie is slow and portrait mode is buggy. Can this help?

Yes. A full firmware reinstallation will restore all the original camera software, drivers, and image processing algorithms. This can fix software-related bugs that cause the app to crash, be slow, or have issues with special features like portrait mode.

Asus Zenfone 4 Selfie Stock Firmware (OTA)

The Asus Zenfone 4 Selfie (ZD553KL) is a mid-range smartphone from 2017, celebrated for its powerful dual front-facing camera system designed to capture high-quality selfies. It runs on Asus’s ZenUI based on Android 7.1.1 Nougat and is powered by a Qualcomm Snapdragon chipset. A very common issue for this device was the official Over-the-Air (OTA) update process failing, which could leave the phone stuck in a bootloop or on the Asus logo. This guide provides the official full OTA update package, which is the perfect and safest tool for manually updating the device or recovering it from a failed update or software corruption.

⚠️ CRUCIAL WARNING: OTA Update File
This is an official OTA (Over-the-Air) update ZIP file, not a raw firmware package for tools like QFIL. It must be installed using ADB Sideload from the phone’s stock recovery menu. This method typically does not wipe data when upgrading, but a factory reset is often required to fix existing bugs. This file is for the **WW (Worldwide) SKU** only.

⚠️ Prerequisites: Before You Begin

Click Here for the Essential Pre-Flashing Checklist

Backup Your Data: While ADB sideload doesn’t always wipe data, it’s highly recommended to back up important files as a factory reset may be needed to solve your issue.
Charge The Battery: Ensure your phone has at least a 60% charge to prevent it from shutting down during the update process.
Windows PC & USB Cable: You will need a Windows computer, the original Asus USB cable, and the correct drivers.

📱 Quick Device Specifications

Device: Asus Zenfone 4 Selfie
Model: ZD553KL (X00LD)
Chipset: Qualcomm Snapdragon 430 (MSM8937)
Display: 5.5″ HD IPS (1280×720)
Operating System: Android 7.1.1 Nougat
RAM: 4GB
Storage: 64GB
Battery: 3000 mAh

🛠 Required Tools & Downloads

File / Tool	Download Link
ADB and Fastboot Platform Tools	Download from Google
Asus USB Drivers	Download Drivers

⬇️ Asus Zenfone 4 Selfie Stock ROM / Firmware

Android Version	Filename	Release Date	Size	Download Link
7.1.1 Nougat	Asus_Zenfone_4_Selfie_…_OTA.zip	~July 2017	3.55 GB	Download (MediaFire)

Quick Steps to Flash Asus Zenfone 4 Selfie Firmware

Download and install the Asus USB drivers. Download and extract the ADB/Fastboot Platform Tools folder.
Download and place the full firmware file (Asus_Zenfone_4_Selfie_..._OTA.zip) inside the extracted Platform Tools folder.
Power off your phone. Reboot into recovery mode by holding Power + Volume Down until the Asus logo appears, then release.
In the recovery menu, use the volume keys to navigate to “Apply update from ADB” and select it with the Power button.
Connect your phone to the PC. In the Platform Tools folder, hold Shift + Right Click and select “Open command window here” (or “PowerShell”).
Type `adb devices` to verify the connection. You should see your device’s serial number with the word “sideload” next to it.
Type the command: `adb sideload` followed by the firmware filename. For example:
adb sideload Asus_Zenfone_4_Selfie_ZD553KL_UL_X00LD_WW_14.0400.1707.149_OTA.zip
The installation will begin. Once it is complete, the phone will return to the recovery menu, where you can select “Reboot system now.”

For a more detailed, step-by-step guide on this process, please refer to our main tutorial:
👉 Full Tutorial: How to Manually Install OTA Updates via ADB Sideload

❓ Frequently Asked Questions (FAQs)

Q1. My phone got stuck during an automatic update and is now in a bootloop. Will this fix it?: Yes, this is the perfect solution for that problem. A failed OTA is a very common issue. Manually flashing the full OTA package via ADB sideload will correctly and completely install the update, fixing the bootloop.
Q2. Will using this OTA file erase my personal data?: If you are simply sideloading the same or a newer version over a working system, it typically will not erase your personal data (photos, apps, etc.). However, if you are flashing to fix a problem like a bootloop, it is highly recommended to perform a “Wipe data/factory reset” from the recovery menu after the flash is complete, which will erase your data.
Q3. The front camera on my Selfie is slow and portrait mode is buggy. Can this help?: Yes. A full firmware reinstallation will restore all the original camera software, drivers, and image processing algorithms. This can fix software-related bugs that cause the app to crash, be slow, or have issues with special features like portrait mode.