ZTE Blade V6 / X7 / D6 (T660) Firmware Flash File Download [Stock Rom]
The ZTE Blade V6, also known by model number T660 and marketed as the Blade X7 or Blade D6 in various regions, is a slim, metal-framed smartphone from 2015. For owners of this classic device, flashing the official stock firmware is the best way to resolve deep-seated software issues, fix common bugs like the “No SIM card detected” error, and restore a phone that has become slow or unresponsive.
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 5.0 Lollipop software.
Quick Device Specs
- Device
- ZTE Blade V6 / X7 / D6 (T660)
- Release year
- 2015
- Chipset
- MediaTek MT6735
- Display
- 5.0″ HD IPS LCD (1280×720)
- Battery
- 2200 mAh (Non-removable)
- Memory
- 2GB RAM + 16GB storage
- Camera
- 13MP rear, 5MP front
- OS
- Android 5.0 (Lollipop)
Required Downloads
| File / Tool | Download Link |
|---|---|
| SP Flash Tool | Download Tool |
| MediaTek USB VCOM Drivers | Download Drivers |
Stock ROM & Firmware
Multiple builds are available for the Blade V6. If you experience issues with one version, please try another from the list.
| Build Date / Model | Android | Region | Type | Download | Size |
|---|---|---|---|---|---|
| (2017-12-22) / T660 | 5.0 (Lollipop) | Global | SP Flash Tool | Download | ~1.0 GB |
| (2015-11-18) / X7 | 5.0 (Lollipop) | Global / Russia | SP Flash Tool | Download | ~1.0 GB |
Quick Flashing Guide
- Download and install the MediaTek VCOM drivers and the SP Flash Tool on your computer.
- Extract your chosen 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. My phone suddenly says “No SIM card.” Will flashing the firmware fix this?
Yes, this is a very common software bug reported for the Blade V6/X7. A full firmware flash using SP Flash Tool is the most reliable way to fix it, as it completely rewrites the modem and baseband software. If the problem persists after a clean flash, it indicates a hardware failure of the SIM reader.
Q2. What is the difference between the Blade V6, Blade X7, and T660?
They are all the same phone. ZTE used different marketing names and model numbers for the same hardware in different parts of the world (e.g., X7 in Russia, T660 in other regions). This firmware should be compatible with all of them.
Q3. The battery life is very bad. Can this update help?
A clean flash will resolve any software bugs causing abnormal battery drain. However, the 2200 mAh battery is small by modern standards, and the physical battery itself has likely degraded significantly over the years. The flash will restore its original performance, but don’t expect it to last like a new phone.
Device-Specific Troubleshooting
- Overheating, especially near the top of the phone: The Blade V6/X7 is known to run warm. A clean firmware flash helps by removing rogue software that might be causing excess CPU usage. To manage the temperature, avoid gaming or using the camera for long periods while charging and dim the screen brightness.
- Unstable Wi-Fi Connection: This firmware restores the original, stable drivers for the Wi-Fi hardware. If you still experience issues with Wi-Fi dropping after a clean flash, try resetting network settings via `Settings > Backup & reset > Network settings reset`.
- “System UI has stopped” or Frequent Freezing: This indicates a corrupted operating system. Flashing the stock ROM using the SP Flash Tool guide is the most reliable way to fix this. The process will wipe all data but installs a fresh, stable copy of Android.
- “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.
