ZTE Blade A610 (T620) Firmware Flash File Download [Stock Rom]
The ZTE Blade A610 (model T620) is a budget smartphone from 2016 that was highly praised for its standout feature: a massive **4000 mAh battery**. For owners of this device needing to resolve software glitches, fix battery calibration errors, or restore a bricked phone to its original factory state, flashing the official stock firmware is the most reliable solution.
Important Note: This device is powered by a MediaTek MT6735 chipset. The restoration process requires the use of **SP Flash Tool**. This guide will help you restore the original Android 5.1 Lollipop software.
Quick Device Specs
- Device
- ZTE Blade A610 (T620)
- Release year
- 2016
- Chipset
- MediaTek MT6735P
- Display
- 5.0″ HD IPS LCD (1280×720)
- Battery
- 4000 mAh (Non-removable)
- Memory
- 1GB/2GB RAM + 8GB/16GB storage
- Camera
- 8MP/13MP rear, 5MP front
- OS
- Android 5.1 (Lollipop)
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 |
|---|---|---|---|---|---|
| (2016-12-01) | 5.1 (Lollipop) | Global | SP Flash Tool | Download | ~1.1 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 `MT6735_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. Is this the same as the Blade A610 Plus / A612?
No. The Blade A610 (T620) is the smaller 5.0-inch model. The Blade A610 Plus (or A612) is a different, larger 5.5-inch phone with a more powerful chipset and an even larger 5000 mAh battery. The firmware packages are not interchangeable.
Q2. Will this update my phone to Android Marshmallow (6.0)?
No. This specific firmware package is for Android 5.1 Lollipop. While some regions did receive a Marshmallow update for the Blade A610, this file will restore the Lollipop OS.
Q3. My phone’s battery percentage gets stuck or drops suddenly. Can a flash fix this?
Yes, software glitches can cause incorrect battery readings. A full firmware flash often resolves this by recalibrating the battery stats file. After flashing, it’s recommended to let the phone fully charge to 100% and then discharge completely to help the system re-learn the battery’s capacity.
Device-Specific Troubleshooting
- Phone Not Charging: While a firmware re-flash can fix software-related charging bugs, the Blade A610 was known for having a micro-USB port that could wear out and fail over time. If the phone still doesn’t charge after a successful flash, inspect the charging port for debris or damage. The issue is likely hardware-related.
- “Insufficient Storage” Errors: The 8GB or 16GB of internal storage is very limited. A clean flash will free up space, but it is essential to use a microSD card for photos and media. Go to `Settings > Apps` to disable any pre-installed bloatware to save space for essential app updates.
- GPS Not Locking or Inaccurate: This firmware restores the original GPS and modem configuration files. If you are experiencing poor GPS performance, a re-flash can sometimes help. For best results after flashing, ensure you have a clear view of the sky and that `Settings > Location` is set to ‘High accuracy’ mode.
- “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.
