ZTE Blade A520 Firmware Flash File Download [Stock Rom]
The ZTE Blade A520 is a compact budget smartphone from 2017 that offered a 5-inch HD display and ran on Android 7.0 Nougat. For a device of this age, it is common to encounter critical software issues. Flashing the official stock firmware is the most effective way to resolve problems like a phone that won’t turn on, fix persistent “NVRAM” errors, or restore a device that is stuck in a bootloop.
Important Note: This device is powered by a MediaTek MT6737 chipset. The restoration process requires the use of SP Flash Tool.
Quick Device Specs
- Device
- ZTE Blade A520
- Release year
- 2017
- Chipset
- MediaTek MT6737
- Display
- 5.0″ HD IPS LCD (1280×720)
- Battery
- 2400 mAh (Non-removable)
- Memory
- 1GB/2GB RAM + 16GB storage
- Camera
- 8MP rear, 8MP front
- OS
- Android 7.0 (Nougat)
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 |
|---|---|---|---|---|---|
| V1.0.0B12 | 7.0 (Nougat) | Global | SP Flash Tool | Download | ~1.3 GB |
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 `MT6737M_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, 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 phone is completely dead and won’t charge or turn on. Can this fix it?
This is a widely reported failure for the Blade A520. A full firmware flash with SP Flash Tool is the only software solution that has a chance of reviving it. If the SP Flash Tool can detect the phone when you plug it in (even with a black screen), there is a good chance of success. If it’s still dead after a successful flash, the internal storage (eMMC) has likely failed.
Q2. I see an “NVRAM WARNING: Err = 0x10” in my Wi-Fi settings. What is that?
This is a specific MediaTek error that indicates a corrupted or missing NVRAM partition, which stores your device’s unique identifiers like IMEI, Wi-Fi, and Bluetooth MAC addresses. Flashing this full stock firmware using the “Download Only” mode is the best way to attempt to restore this partition. Avoid using the “Format All” option, as it will make this problem worse.
Q3. Is this the same as the ZTE Blade A521?
No. The Blade A520 and A521 are different models with different hardware (MT6737 vs. MT6580). Their firmware is not interchangeable and flashing the wrong file will brick your device.
Device-Specific Troubleshooting
- Camera Shows a Black Screen or Fails to Start: This is a known software bug on some Blade A520 units. Flashing this stock firmware is the most reliable fix. If the problem persists after a clean flash and a factory reset, it strongly indicates a hardware failure of the camera module itself.
- “Ghost Touch” or Erratic Screen Behavior: While often a hardware issue with the screen’s digitizer, “ghost touch” can sometimes be caused by software or driver bugs. A full firmware flash is a good troubleshooting step. Before flashing, ensure the screen is perfectly clean. If the issue remains after the flash, a screen replacement is likely necessary.
- SP Flash Tool Fails with a BROM Error: On older devices like this, BROM errors are almost always due to incorrect drivers. Reinstall the VCOM drivers (disabling driver signature enforcement in Windows first). Also, ensure the phone is completely powered off and try connecting while holding the Volume Down button if it’s not detected automatically.
- “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.
