ZTE Blade X3 / A452 Firmware Flash File Download [Stock Rom]
The ZTE Blade X3 (also known as the ZTE Blade A452) is a budget smartphone from 2015 that was highly sought after for its main selling point: a massive 4000 mAh battery. For owners of this classic endurance phone, flashing the official stock firmware is the best way to resolve software-related battery issues, fix a device stuck in a bootloop, or restore it to its original factory condition.
Important Note: This device is powered by a MediaTek MT6735P chipset. The restoration process requires the use of SP Flash Tool. This guide will help you restore the original Android 5.1 Lollipop software.
Quick Device Specs
- Device
- ZTE Blade X3 / A452
- Model
- P635F33
- Release year
- 2015
- Chipset
- MediaTek MT6735P
- Display
- 5.0″ HD IPS LCD (1280×720)
- Battery
- 4000 mAh (Removable)
- Memory
- 1GB RAM + 8GB storage
- Camera
- 8MP rear, 5MP front
- OS
- Android 5.1 (Lollipop)
Required Downloads
| File / Tool | Download Link |
|---|---|
| SP Flash Tool | Download Tool |
| MediaTek USB VCOM Drivers | Download Drivers |
Stock ROM & Firmware
| Version | Android | Region | Type | Download | Size |
|---|---|---|---|---|---|
| V1.0.0 | 5.1 (Lollipop) | Global | SP Flash Tool | Download | ~950 MB |
Quick Flashing Guide
- Download and install the MediaTek VCOM drivers and the SP Flash Tool on your computer.
- Extract the downloaded firmware ZIP file to find the `MT6735M_Android_scatter.txt` file.
- Launch SP Flash Tool, load the scatter file, and ensure the flashing mode is set to “Download Only.”
- Power off your phone, remove the battery, click the “Download” button in the tool, and then connect the phone to your PC via USB to begin.
For a complete, step-by-step tutorial with screenshots, please refer to our definitive guide:
How to Flash Stock Firmware on MediaTek (MTK) Smartphones
FAQs
Q1. My 4000 mAh battery drains very quickly. Will flashing fix this?
Yes, often it will. Abnormal battery drain is frequently caused by software bugs or rogue background processes. A clean flash of the stock firmware will eliminate these issues and restore the battery’s performance to its factory potential. After flashing, let the phone charge fully to 100% to help recalibrate.
Q2. Can I update this phone from Android 5.1 Lollipop?
No. Android 5.1 was the only major OS version officially released for the Blade X3. This firmware is for restoring that original system. There are no official newer versions like Marshmallow or Nougat available for this model.
Q3. Is this the same as the Blade X5 or Blade X7?
No. The Blade X3, X5, and X7 are all different models in the same series with different specifications and hardware. This firmware is strictly for the Blade X3 and will brick other models.
Device-Specific Troubleshooting
- Sudden Battery Percentage Drops: A common issue on this model is the battery percentage jumping or dropping suddenly (e.g., from 50% to 15%). This is a software calibration error. A full firmware flash is the best way to fix this. After flashing, let the phone fully discharge until it turns off, then charge it to 100% without interruption to help the system re-learn the battery levels.
- Overheating While Charging: While it’s normal for a large 4000 mAh battery to get warm, excessive heat can indicate a problem. A firmware flash can fix software bugs causing the phone to draw too much power. If it still gets very hot after a clean flash, you may be using a non-original or faulty charger.
- “Insufficient Storage” Error: The 8GB of internal storage is a major bottleneck. A clean flash will free up space, but it’s essential to use a microSD card for all photos and media. Go to `Settings > Apps` to disable any pre-installed apps you don’t use to save space.
- “Invalid IMEI” after Flashing: This critical error occurs if you use the “Format All + Download” option in SP Flash Tool. It erases the phone’s unique identifier. To prevent this, always use the “Download Only” mode. Restoring a lost IMEI is a very complex process.
