The ZTE Blade A31 Lite is a modern, ultra-affordable 4G smartphone designed for essential daily use. To ensure a smooth experience on its entry-level hardware, it runs on the lightweight and optimized Android 11 (Go edition). Powered by a UNISOC SC9863A chipset and featuring a compact design, it’s a great choice for a first smartphone or a reliable backup device. This guide provides the official stock ROM for the Russian variant, which is essential for unbricking the device, fixing software bugs, or removing a Google FRP lock.
Important: This firmware is specifically for the ZTE Blade A31 Lite (Russian variant). Flashing this file on a different model or a variant from another region may cause network issues or brick your device. The flashing process requires specific tools for UNISOC/Spreadtrum chipsets.
Quick Device Specs
- Device: ZTE Blade A31 Lite
- Release year: 2021
- Chipset: UNISOC SC9863A
- Display: 5.45″ IPS LCD
- Battery: 2000 mAh
- Original OS: Android 11 (Go edition)
Required Downloads
To flash a Spreadtrum/UNISOC device, you will need the specific drivers and flashing tool. You can find the downloads for these in our main guide linked below.
- SPD Upgrade Tool or SPD Research Tool
- Spreadtrum/UNISOC USB Drivers
Stock ROM (Firmware)
| Region / Carrier | Build | Android | Type | Download | Chipset |
|---|---|---|---|---|---|
| Russia | V1.0.0B08 | 11 (Go) | SPD .pac Firmware |
Download | UNISOC/SPD |
How to Flash the Stock Firmware
Flashing the stock ROM onto your ZTE Blade A31 Lite requires a Windows PC and the SPD Upgrade Tool. The process involves installing the correct UNISOC drivers, loading the .pac firmware file from the download into the tool, and then connecting your powered-off phone while holding the Volume Down key to initiate the flash. This will completely restore your device to its original factory software.
For detailed, step-by-step instructions with screenshots and tool download links, please follow our comprehensive pillar guide: How to Use the SPD Upgrade Tool to Flash Your Smartphone.
Device-Specific Troubleshooting for ZTE Blade A31 Lite
- Correct Driver Installation: The most common failure point is incorrect drivers. If the tool doesn’t see your phone, you must install the Spreadtrum/UNISOC drivers, which often requires you to disable ‘Driver Signature Enforcement’ in Windows first.
- Using the “Boot Key”: To initiate the flash, power the phone off completely. Press and hold the Volume Down button, and *while holding it*, connect the phone to your PC. The tool should then detect it and begin the process.
- Fixing Google FRP Lock: If you’re locked out of your phone by Google’s Factory Reset Protection (FRP), flashing this stock ROM will perform a complete wipe and remove the locked account.
- Russian Firmware: This is an official ROM for the Russian market. Flashing it on a device purchased in a different region (e.g., Latin America) is not recommended and may cause issues with cellular network bands.
FAQs
Q1. What is Android 11 (Go edition)?
Android Go is a lightweight version of the Android operating system, specifically designed by Google to run smoothly on entry-level smartphones with 2GB of RAM or less. It includes optimized “Go” versions of popular apps.
Q2. What is a .pac file?
A .pac file is a packed firmware file used for Spreadtrum/UNISOC chipsets. It contains all the necessary partitions—system, boot, recovery, modem, etc.—in a single, integrated file for flashing.
Q3. Will this process erase my data?
Yes. Flashing the stock ROM with the SPD Upgrade Tool will perform a full factory reset and completely wipe all personal data, apps, and settings from your device.
Q4. My phone is very slow. Will this help?
Yes. For a device with basic specifications running Android Go, a clean factory restore by flashing the stock ROM is the most effective way to fix slowness and restore its original performance.
