This page contains the official download link for the BQ Mobile BQ-5517L Twin Pro stock firmware. Released in mid-2018, the Twin Pro was a unique, camera-centric smartphone from BQ. Its standout feature, and the reason for its name, is the dual-camera setup on both the front and the back, which was a premium feature for its time. It is powered by the octa-core MediaTek MT6750T processor, features a crisp 5.5-inch Full HD display, and runs on Android 8.1 Oreo.
Software issues, such as camera app failures, system lag, or bootloops, can diminish the user experience. If your BQ-5517L Twin Pro is suffering from these problems, flashing the official stock ROM is the most effective solution. This flash file will completely restore the device’s operating system to its factory condition, resolving all software conflicts and bugs. This guide provides the necessary files to help you unbrick your phone and fix its software issues.
User Data Advisory for the BQ-5517L Twin Pro
CRITICAL NOTICE: The firmware flashing procedure will perform a full data wipe, permanently erasing all personal files from your phone’s internal storage. This includes photos, contacts, apps, and documents. It is imperative that you back up all your important data before you start. Proceed with this guide at your own risk.
BQ-5517L Twin Pro: Quick Device Specifications
- Device Name:
- BQ Mobile BQ-5517L Twin Pro
- Release Date:
- June 2018
- Chipset:
- MediaTek MT6750T (28nm)
- Display:
- 5.5 inches, IPS LCD, 1920 x 1080 pixels (Full HD)
- Battery:
- Li-Po 3080 mAh, non-removable
- RAM/Storage:
- 3GB RAM, 32GB Internal Storage
- Original OS:
- Android 8.1 Oreo
- Special Features:
- Dual Rear Cameras (13MP+2MP), Dual Front Cameras (20MP+8MP) with Flash, NFC, Front-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-5517L Twin 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-5517L Twin Pro Stock Firmware
| Region / Build | Android Version | Chipset | Download Link |
|---|---|---|---|
| OS4.0_E (20180623) | Android 8.1 Oreo | MediaTek MT6750 | Download (Google Drive) |
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_Mobile_BQ-5517L_MT6750...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. Camera App Freezes or Features are Missing
Cause: As a camera-focused phone, the BQ-5517L Twin Pro relies heavily on its software for processing. A corrupted system file or a bad third-party app can cause the camera to malfunction, freeze, or fail to use features like portrait mode.
Solution: Flashing the official stock firmware is the best way to resolve this, as it reinstalls all the original camera drivers and software libraries. After flashing, avoid restoring app data from a backup; instead, reinstall apps fresh from the Play Store to prevent the issue from returning.
2. SP Flash Tool Shows a BROM or DA Error
Cause: These errors typically point to a communication failure between the PC and the phone. This can be due to incorrect drivers, a faulty USB cable, or an incompatible version of the SP Flash Tool.
Solution: Ensure you are using a recent version of the tool and have properly installed the MediaTek VCOM drivers (rebooting your PC after installation). Use a high-quality USB cable connected to a main port on your computer. If errors persist, try holding the Volume Down key while connecting the phone to the PC.
3. Invalid IMEI or No Network Signal After Flashing
Cause: This critical error occurs if the phone’s NVRAM partition, which stores its unique IMEI numbers and network calibration data, is erased. This is almost always caused by using the “Format All + Download” option in SP Flash Tool.
Solution: To prevent this, never use any option other than “Download Only”. If the damage is done, you will need advanced tools like Maui META to rewrite the original IMEI numbers (found on the phone’s box) back to the device. This is a complex procedure.
Frequently Asked Questions (FAQs)
- Why is this phone called the “Twin Pro”?
- The name “Twin Pro” refers to the phone’s dual-camera systems. The BQ-5517L Twin Pro features two cameras on the back for depth effects (portrait mode) and two cameras on the front for enhanced selfies, which was its main marketing feature.
- Can I upgrade the BQ-5517L Twin Pro to Android 9 Pie?
- No. The firmware provided, Android 8.1 Oreo, is the last major official software version released for this device. There were no official updates to Android 9 or newer for this model.
- Will flashing this firmware fix my fingerprint scanner if it’s not working?
- It might. If the fingerprint scanner has stopped working due to a software glitch or a corrupted driver, flashing the stock ROM will restore the original software and should fix it. However, if the scanner is physically damaged, this will not help.
- Does this phone have NFC for Google Pay?
- Yes, the BQ-5517L Twin Pro is equipped with an NFC chip, allowing it to be used for contactless payments through services like Google Pay, provided the service is available in your region.
Conclusion
Restoring your BQ-5517L Twin Pro with its official stock firmware is the definitive way to fix software issues, especially those related to its complex camera system. By using the SP Flash Tool and the files provided, and by carefully following the full instructions in our main guide, you can bring your device back to its original, stable condition. Always remember to back up your data before starting.
If this guide was helpful, or if a link is broken, please let us know in the comments below.
