The ZTE Blade A6 (model A0620) is a budget-friendly smartphone from 2017 designed for users who demand exceptional battery life. Its standout feature is a massive 5000 mAh battery, which also supports reverse charging, allowing it to function as a power bank to charge other devices. Powered by a Qualcomm Snapdragon 435 processor and featuring a 5.2-inch HD display, it’s a true endurance champion. This guide provides the official stock ROM, a low-level QFIL / EDL package, designed to unbrick a hard-bricked phone, resolve persistent software errors, or bypass a Google FRP lock.
Important: This is an advanced unbricking procedure. This firmware is specifically for the ZTE Blade A6 (A0620). The flashing process requires your phone to be in EDL Mode (9008), and the process will erase all data.
Quick Device Specs
- Device: ZTE Blade A6 (A0620)
- Release year: 2017
- Chipset: Qualcomm Snapdragon 435
- Display: 5.2″ IPS LCD, HD
- Battery: 5000 mAh, Reverse Charging
- Original OS: Android 7.1 (Nougat)
Required Downloads
To flash a Qualcomm device in EDL mode, you will need the specific QPST suite and drivers. You can find the downloads for these in our main guide linked below.
- QPST & QFIL Flash Tool
- Qualcomm QDLoader USB Drivers
Unbrick Firmware (QFIL)
| Region / Carrier | Build | Android | Type | Download | Chipset |
|---|---|---|---|---|---|
| Generic / Unspecified | V1.0 | 7.1 | QFIL EDL Unbrick ROM | Download | Qualcomm |
How to Flash the Stock Firmware
Restoring a bricked ZTE Blade A6 requires a Windows PC and the QFIL tool. The process involves installing the correct Qualcomm drivers, forcing your phone into EDL Mode by holding Volume Up + Down and connecting the USB cable, loading the firehose programmer and XML files from the firmware, and then starting the download.
For a detailed, step-by-step guide with screenshots and tool download links, please follow our comprehensive pillar guide: How to Use QFIL to Flash Qualcomm Devices.
Device-Specific Troubleshooting for ZTE Blade A6 (A0620)
- “No Port Available” / Driver Issues: This is the most common problem. If QFIL doesn’t see the “Qualcomm HS-USB QDLoader 9008” port, your drivers are not installed correctly. You must disable Driver Signature Enforcement in Windows before running the driver installer. Reboot your PC after installation and try again.
- Entering EDL Mode: Ensure the phone is completely powered off. Press and hold both Volume Up and Volume Down buttons simultaneously. While holding them, plug the USB cable into the phone. The screen will stay black, but your PC should make a connection sound, and the port will appear in QFIL.
- QFIL “Sahara” or “Firehose” Error: This error points to a communication failure. Use a high-quality USB cable, connect directly to a reliable USB 2.0 port on your computer, and ensure no other conflicting mobile drivers are installed.
- Fixing Google FRP Lock: If you are locked out of your phone by Google’s Factory Reset Protection (FRP) after a reset, flashing this official stock ROM using the QFIL “Download” process will completely wipe the device and remove the locked account, allowing you to set it up as new.
FAQs
Q1. What is a QFIL / EDL firmware?
QFIL (Qualcomm Flash Image Loader) is a tool used to flash firmware in EDL (Emergency Download) mode. This is a very low-level mode, a step below fastboot, designed to recover Qualcomm devices from a “hard brick” state where they are otherwise unresponsive.
Q2. What is “Reverse Charging”?
Thanks to its massive 5000 mAh battery, the ZTE Blade A6 supports reverse charging. This means you can use an OTG (On-The-Go) cable to connect another device (like another phone or headphones) to your Blade A6 and use it as a portable power bank to charge them.
Q3. Will this unlock my phone from its carrier?
No. Flashing the stock firmware restores the phone’s original software, but it does not remove the SIM/network lock put in place by a carrier.
Q4. Will this process erase my data?
Yes. A QFIL flash is a complete factory restore that erases all user data from the phone’s internal storage.
