This page provides the official download link for the BQ 5515L Fast Pro stock firmware. As a budget-friendly smartphone from 2018, the BQ 5515L Fast Pro offered a modern design for its time, featuring an 18:9 “Full View” display and a rear-mounted fingerprint scanner. It is powered by the MediaTek MT6739 quad-core processor and runs on Android 8.1 Oreo.
Over time, software can become slow or unstable due to accumulated cache, app conflicts, or corrupted files. If your BQ 5515L Fast Pro is experiencing significant lag, is stuck in a bootloop, or has other persistent software errors, reinstalling the official stock ROM is the most effective solution. This flash file will restore your device’s software to its original factory condition, fixing bugs and improving stability. This guide provides the files needed to unbrick your phone.
User Data Advisory for the BQ 5515L Fast Pro
CRITICAL WARNING: The process of flashing firmware will completely erase all personal data from your phone’s internal storage. This includes your photos, contacts, apps, and personal settings. It is essential to perform a full backup of all important files before you begin. Proceed with this guide at your own risk.
BQ 5515L Fast Pro: Quick Device Specifications
- Device Name:
- BQ 5515L Fast Pro
- Release Date:
- April 2018
- Chipset:
- MediaTek MT6739 (28nm)
- Display:
- 5.5 inches, IPS LCD, 1440 x 720 pixels (HD+)
- Battery:
- Li-Ion 3000 mAh, non-removable
- RAM/Storage:
- 2GB RAM, 16GB Internal Storage
- Original OS:
- Android 8.1 Oreo
- Special Features:
- 18:9 Aspect Ratio Display, Rear-mounted Fingerprint Scanner, 4G LTE
Required Downloads
Before proceeding, download the firmware package and the necessary tools and drivers from the links below. Extract them all into a single, easy-to-find folder on your computer.
- Firmware Package: The official ROM for the BQ 5515L Fast Pro is available in the table below.
- SP Flash Tool: The official utility for flashing MediaTek chipsets.
- MediaTek VCOM USB Drivers: Essential for your computer to recognize the device.
Download BQ 5515L Fast Pro Stock Firmware
| Region / Build | Android Version | File Size | Download Link |
|---|---|---|---|
| 20180409 | Android 8.1 Oreo | 1.03GB | Download (MediaFire) |
How to Flash the Firmware: 5 Key Points
This is a high-level overview of the flashing process using SP Flash Tool. For a full, safe, and detailed guide, you must click through to our main pillar article linked below.
- Prepare Your PC: Download and install the required MediaTek VCOM USB drivers to ensure your computer can communicate with your phone.
- Load the Firmware: Launch SP Flash Tool and load the firmware by selecting the `…scatter.txt` file from the extracted firmware folder (e.g.,
BQ_5515L_MT6739...zip). - Configure the Tool: Ensure the flashing mode is set to “Download Only.” This is the safest option and helps prevent the loss of your phone’s IMEI number.
- Initiate the Flash: Power off your phone completely. Click the large “Download” button within the SP Flash Tool to set it to standby.
- Connect Your Device: Immediately connect your powered-off phone to the PC with a USB cable to begin the flashing process, which finishes when a green “OK” checkmark appears.
Warning: This summary omits critical steps. For the complete, illustrated guide, please visit our main article: How to Flash Stock Firmware on MediaTek Smartphones.
Troubleshooting Common Issues
1. SP Flash Tool DA or BROM Error
Cause: The MediaTek MT6739 chipset can sometimes require a specific Download Agent (DA) file or a newer version of SP Flash Tool to flash correctly. A BROM error usually points to a driver issue.
Solution: Ensure you are using a recent version of SP Flash Tool. If the default DA doesn’t work, you may need a custom DA file (often found in developer forums). Always start by reinstalling the VCOM drivers and using a high-quality USB cable. Try connecting the phone while holding the Volume Down key.
2. Phone is Still Slow After Flashing
Cause: The BQ 5515L Fast Pro runs a full version of Android 8.1 on an entry-level MT6739 chipset with 2GB of RAM. This combination is not designed for heavy multitasking or gaming, and performance can be modest even on a clean install.
Solution: After flashing, limit the number of apps you install. Disable auto-start for apps you don’t need running constantly. Go to Developer Options and set all animation scales to 0.5x to make the user interface feel snappier. Use “Lite” versions of apps where possible.
3. GPS Has Trouble Getting a Lock
Cause: Some users have reported weak or slow GPS performance on devices with the MT6739 chipset. This can be caused by a software or driver issue, which a firmware flash can address.
Solution: Flashing the stock ROM ensures you have the correct, factory-calibrated GPS drivers. After flashing, go outside to an area with a clear view of the sky. Use a “GPS Test” app from the Play Store to help the device get a fresh satellite lock, which can improve performance on subsequent uses.
Frequently Asked Questions (FAQs)
- Can I upgrade the BQ 5515L Fast Pro to Android 9 Pie?
- No. The firmware provided, Android 8.1 Oreo, is the last major software version officially released by BQ for this device. There were no official updates to Android 9 or newer for the BQ 5515L Fast Pro.
- Will this firmware fix my fingerprint scanner if it has stopped responding?
- It is very likely to help. If the fingerprint scanner issue is caused by a software glitch or a corrupted driver, flashing the stock ROM will restore the original, functional software. However, it cannot fix a hardware problem if the scanner itself is damaged.
- Why is my 16GB storage full so quickly?
- The Android OS and pre-installed applications on the BQ 5515L Fast Pro can occupy 8-10GB of the total 16GB of storage. This leaves very little space for user apps, photos, and videos. Using a microSD card is highly recommended for storing media files.
- Does this firmware remove root access?
- Yes. Flashing the official stock ROM will completely overwrite any system modifications, including root access (like Magisk) and custom recoveries (like TWRP), returning the phone to a factory-locked state.
Conclusion
Restoring your BQ 5515L Fast Pro with its official stock firmware is the most reliable way to solve software-related problems, from system lag to boot failures. By using the SP Flash Tool and the files provided, and by carefully following the full instructions in our main pillar guide, you can successfully return your phone to its original, stable condition. Always remember to back up your important data before starting the process.
If this guide was helpful, or if a link is broken, please let us know in the comments below.
