The Bluboo X550 was famous for one thing: its enormous 5300mAh battery. However, many users have reported that over time, the device suffers from severe unexpected battery drain, slow charging issues, and overall system lag that makes the phone frustrating to use. Other common complaints include Wi-Fi connectivity problems and random reboots. These software-level bugs can ruin the user experience. By reinstalling the official stock firmware, you can wipe the slate clean, fix these performance and battery issues, and restore your Bluboo X550 to its original, reliable state.
Bluboo X550 Firmware Details
| Device | Bluboo X550 |
| Model | X550 |
| Chipset | MediaTek MT6735 |
| Android Version | 5.1 (Lollipop) |
| Firmware Version | 21_150923 |
| Build Date | 2015-09-23 |
| File Size | 678MB |
| File Type | .zip (Scatter Firmware) |
| Flashing Tool | SP Flash Tool |
Warning: Flashing new firmware onto your Bluboo X550 will erase all of your personal data, including photos, contacts, and installed apps. It is critical that you back up everything important before you begin this process. Any mistake, such as a disconnected cable or power loss during flashing, can permanently brick your phone. Proceed at your own risk.
Download Official Firmware for Bluboo X550
This is the official stock ROM package for the Bluboo X550. It contains the complete software required to perform a full system restore.
📄 Filename: Bluboo_X550_21_150923.zip
📦 Size: 678MB
🗓️ Build Date: 2015-09-23
🔢 Build Version: 21_150923
🤖 Android Version: 5.1 Lollipop
⬇️ Download Link: Download from MediaFire
How to Flash the Firmware
The Bluboo X550 runs on a MediaTek (MTK) processor, which means you’ll need the SP Flash Tool and a Windows PC to install the firmware. Here is a quick overview of the process:
- Download and install the necessary MediaTek VCOM USB drivers on your computer to ensure it can detect your phone.
- Download the firmware ZIP file from the link above and extract all its contents to a single folder on your PC.
- Download and extract the SP Flash Tool, then double-click `flash_tool.exe` to run the application.
- Inside the SP Flash Tool, click the “Scatter-loading” button. Navigate to your extracted firmware folder and select the `MT6735_Android_scatter.txt` file.
- Turn your Bluboo X550 off completely. Click the “Download” button in the SP Flash Tool, then immediately connect your powered-down phone to the computer via USB cable to start the flashing process.
For a complete guide with pictures and video showing you every step in detail, please go here to see that: How to Flash MediaTek Phones using SP Flash Tool.
Disclaimer: This guide and the firmware are provided for educational purposes only. We are not responsible for what happens to your phone. By proceeding, you agree to take full responsibility for any potential damage or data loss. If you get stuck or have questions, please drop a comment on the thread for help.
