The ZTE Blade A5 2019 is an entry-level smartphone that offers a modern design with a waterdrop notch display and solid basics for everyday use. It is powered by the octa-core UNISOC SC9863A chipset, providing a reliable Android experience. This guide provides official stock ROMs for the Russian and Telcel Mexico variants, which are essential for unbricking the device, fixing software bugs, or removing a Google FRP lock.
Important: This firmware is specifically for the ZTE Blade A5 2019. As a UNISOC/Spreadtrum device, it requires the SPD Upgrade Tool. Flashing the wrong regional firmware on your device can cause network issues or a hard brick. This process will erase all your data.
Quick Device Specs
- Device: ZTE Blade A5 (2019)
- Release year: 2019
- Chipset: UNISOC SC9863A
- Display: 6.09″ IPS LCD, HD+
- Battery: 3200 mAh
- Original OS: Android 9 Pie
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 | V2.2 | 9.0 | SPD .pac Firmware |
Download | UNISOC/SPD |
| Mexico (Telcel) | V7.7 | 9.0 | SPD .pac Firmware |
Download | UNISOC/SPD |
How to Flash the Stock Firmware
Flashing the stock ROM onto your ZTE Blade A5 2019 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.
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 A5 2019
- 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.
- CRITICAL – Choose the Correct Regional Firmware: This page provides firmware for Russia and Telcel Mexico. They are not interchangeable. Flashing the wrong regional firmware will likely cause your phone to have “No Service” or other network-related issues due to an incorrect modem configuration. Always flash the firmware that matches your device’s original region.
FAQs
Q1. 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.
Q2. Can I use the Mexico ROM on my Russian phone?
It is strongly advised against it. While the phone might boot, the modem files are different, which will likely result in your SIM card not working and you having no network signal.
Q3. Will this unlock my phone from the Telcel network?
No. Flashing the official carrier ROM will restore the phone’s software, but it will not remove the SIM/network lock.
Q4. 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.
