The ZTE Blade X3, also known as the Blade D2 in some markets, is a budget-friendly smartphone from 2015 designed for users who prioritize battery life. Its standout feature is a large 4000 mAh battery, which also supports reverse charging, allowing it to function as a power bank for other devices. Powered by a MediaTek MT6735 processor and featuring a 5.0-inch HD display, it was a reliable endurance device. This guide provides the official stock ROM, 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 X3 / D2. As a MediaTek device, it requires the SP Flash Tool for flashing. Flashing this on a different model will cause a hard brick. This process will erase all data on your device.
Quick Device Specs
- Device: ZTE Blade X3 / Blade D2
- Release year: 2015
- Chipset: MediaTek MT6735
- Display: 5.0″ IPS LCD, HD
- Battery: 4000 mAh, Reverse Charging
- Original OS: Android 5.1 Lollipop
Required Downloads
To flash a MediaTek device, you will need the specific drivers and flashing tool. You can find the downloads for these in our main guide linked below.
- SP Flash Tool
- MediaTek VCOM USB Drivers
Stock ROM (Firmware)
| Build | Android | Type | Download | Chipset |
|---|---|---|---|---|
| V1.0.0 | 5.1 | SP Flash Tool Firmware | Download | MediaTek |
How to Flash the Stock Firmware
Flashing the stock ROM onto your ZTE Blade X3 requires a Windows PC and the SP Flash Tool. The process involves installing the MediaTek VCOM drivers, loading the MT6735M_Android_scatter.txt file from the firmware into the tool, and then connecting your powered-off phone to start 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 Flash Firmware with SP Flash Tool.
Device-Specific Troubleshooting for ZTE Blade X3
- Correct Driver Installation: The most common failure point is incorrect drivers. If the tool doesn’t see your phone, you must install the MediaTek VCOM 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. If Volume Down doesn’t work, try holding Volume Up.
- 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.
- Safer Flashing (Uncheck Preloader): For a safer flashing process that is less likely to cause a hard brick, it is highly recommended to uncheck the `preloader` partition in SP Flash Tool before clicking Download. Flashing an incorrect preloader is the most common cause of a permanently dead phone. Only flash the preloader if the device is already completely bricked.
FAQs
Q1. What is “Reverse Charging”?
Thanks to its large 4000 mAh battery, the ZTE Blade X3 supports reverse charging. This means you can use an OTG (On-The-Go) cable to connect another device (like a different phone or wireless earbuds) to your Blade X3 and use it as a portable power bank to charge them.
Q2. Is the Blade X3 the same as the Blade D2?
Yes, in some regions, the device sold as the Blade X3 was marketed as the Blade D2. They are the same hardware and use the same firmware.
Q3. My phone is stuck on the ZTE logo. Will this fix it?
Yes. Being stuck on the logo (a “bootloop”) is a classic software problem. Flashing the stock ROM is the most reliable way to fix this issue as it completely reinstalls the phone’s operating system.
Q4. Will this process erase my data?
Yes. Flashing the stock ROM with SP Flash Tool will perform a full factory reset and completely wipe all personal data, apps, and settings from your device.
