ZTE Blade A520s Firmware Flash File Download [Stock Rom]
ZTE Blade A520s (multiple variants) is an entry-level smartphone series featuring compact design and MediaTek chipset. If your device is experiencing software issues, performance problems, or connectivity errors, flashing the correct stock firmware can help restore its functionality. This page provides official stock ROMs for different variants of the ZTE Blade A520s.
Important Note: These ZTE Blade A520s models use MediaTek MT6737M/MT6739 chipsets which require QPST or SP Flash Tool for flashing. Ensure you download the correct firmware version for your specific device model.
Quick Device Specs
- Device: ZTE Blade A520s (Multiple variants)
- Release year: 2018-2019
- Chipset: MediaTek MT6737M/MT6739
- Display: 5.0″ IPS LCD, 480×854 (FWVGA)
- Battery: 2000-2400 mAh (Removable)
- Memory: 1GB RAM + 16GB storage
- Camera: 5MP rear, 2MP front camera
- Original OS: Android 7.0 Nougat
Required Downloads
| File / Tool | Download Link |
|---|---|
| QPST Tool | Download QPST |
| SP Flash Tool | Download SP Flash Tool |
| MediaTek USB Drivers | Download Drivers |
| Qualcomm QDLoader Drivers | Download QDLoader |
Stock ROMs & Firmware
| Version | Build Number | Chipset | Region | Download | Size |
|---|---|---|---|---|---|
| B04 | P809S10V1.0.0B04 | MT6739 | China/CMC | Download | ~1.2 GB |
| B05 | P809S10V1.0.0B05 | MT6739 | China | Download | ~1.2 GB |
| B10 | P809S10V1.0.0B10 | MT6739 | China | Download | ~1.3 GB |
| B18 | P637T10V1.0.0B18 | MT6737M | International | Download | ~1.1 GB |
How to Flash Using QPST/SP Flash Tool
- Install MediaTek USB Drivers: Extract and install the MediaTek drivers. Disable driver signature enforcement on Windows if needed.
- Extract the Firmware: Extract the downloaded ZIP file to get the ROM files including scatter.txt.
- Open Flash Tool: Load the scatter.txt file in QPST or SP Flash Tool.
- Select Download Mode: Choose “Download Only” or “Firmware Upgrade”.
- Power off your device completely. Click “Download” then connect your phone via USB.
- Wait for flashing to complete (green circle indicator). Disconnect and power on.
FAQs
Q1. What’s the difference between MT6739 and MT6737M chipsets?
The MediaTek chipsets have key differences:
- MT6739: Newer, supports 18:9 displays, better LTE connectivity
- MT6737M: Older, traditional 16:9 support, basic LTE features
- Performance: MT6739 has slightly better CPU/GPU performance
- Compatibility: Firmware is not interchangeable between chipsets
Q2. Why are there multiple firmware versions for the same device?
Different firmware versions serve various purposes:
- Regional variations: Different network configurations
- Security updates: Later versions have newer security patches
- Bug fixes: Newer versions address previous issues
- Carrier customizations: Specific features for different carriers
Q3. Can I upgrade to Android 8.0 or higher on this device?
Due to hardware limitations and manufacturer support:
- No official Android 8.0+ updates available
- MediaTek MT6737M/MT6739 lack custom ROM support
- Device launched with Android 7.0 as final OS version
- Consider using lightweight applications instead
Q4. Why is storage space so limited on this device?
With only 16GB storage, limitations include:
- System files占用 significant space
- Pre-installed applications reducing available storage
- Media files consuming remaining space
- App caches and data accumulating over time
Use SD card for media storage and regularly clear app caches.
Troubleshooting (ZTE A520s Specific)
- “BROM ERROR: S-CHIP HASH DOES NOT MATCH”: You’re trying to flash firmware for the wrong chipset variant. Ensure you have correct firmware for your device’s specific model.
- QPST/SP Flash Tool not detecting device: This is usually a driver issue. Install the correct MediaTek USB drivers and try different USB ports. Ensure device is in download mode.
- IMEI lost after flashing: MediaTek devices store IMEI in NVRAM. You’ll need to restore IMEI using SN Write Tool or similar utilities if backup is unavailable.
- Device stuck on boot logo: Usually indicates incompatible firmware or flash error. Ensure you have the correct version for your device model and chipset.
- Network connectivity issues: You may have flashed the wrong regional version. Use firmware matching your device’s original region and carrier.
- Insufficient storage errors: With only 16GB storage, regularly manage space by moving files to SD card, clearing caches, and uninstalling unused apps.
