This page provides the official download link for the BQ Mobile BQ-5740G Spring stock firmware. Released in 2020, the BQ-5740G Spring is a budget-conscious smartphone designed to offer a modern Android experience at an accessible price point. It features a 5.7-inch display and is powered by a UNISOC SC7731E chipset. Crucially, it runs on Android 10 (Go Edition), a version of Android specifically optimized for devices with 1GB of RAM, ensuring core applications run smoothly.
Despite optimizations, software issues can arise over time. If your BQ-5740G Spring is stuck in a bootloop, experiencing severe lag, infected with malware, or locked due to Factory Reset Protection (FRP), flashing the official stock ROM is the most effective solution. This flash file will completely restore your phone’s software to its original factory condition, resolving all software-related problems. This guide will help you unbrick your device and restore its intended performance.
User Data Advisory for the BQ-5740G Spring
CRITICAL WARNING: Proceeding with the firmware flashing process will permanently erase all personal data from your BQ-5740G Spring. This includes your photos, contacts, apps, and files stored on the internal memory. A complete backup is essential before you begin. Inaruguide.com is not responsible for any damage or data loss. Proceed at your own risk.
BQ-5740G Spring: Quick Device Specifications
- Device Name:
- BQ Mobile BQ-5740G Spring
- Release Date:
- 2020
- Chipset:
- UNISOC SC7731E (28nm)
- Display:
- 5.7 inches, IPS LCD, 960 x 480 pixels
- Battery:
- Li-Ion 2500 mAh, removable
- RAM/Storage:
- 1GB RAM, 16GB Internal Storage
- Original OS:
- Android 10 (Go Edition)
- Connectivity:
- 3G HSPA+, Wi-Fi, Bluetooth, Dual SIM
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-5740G Spring is available in the table below.
- SPD Upgrade Tool: The official utility for flashing UNISOC/Spreadtrum chipsets.
- Spreadtrum USB Drivers: Essential for your computer to recognize the device.
Download BQ-5740G Spring Stock Firmware
| Region / Build | Android Version | Chipset | Download Link |
|---|---|---|---|
| V03 (2020-11-05) | Android 10 (Go Edition) | UNISOC SC7731E | Download (Google Drive) |
How to Flash the Firmware: 5 Key Points
This is a high-level overview of the flashing process using the SPD Upgrade Tool. For a full, safe, and detailed guide with screenshots, you must click through to our main pillar article linked below.
- Prepare Your PC: Download and install the required Spreadtrum USB drivers. A PC restart is recommended after installation.
- Load the Firmware: Launch the SPD Upgrade Tool and click the gear icon to load the firmware. Select the file with the
.pacextension from within the extracted firmware folder (e.g.,BQ_Mobile_BQ-5740G_V03_..._SPD.zip). - Prepare the Tool: After the firmware is loaded, click the “Start Downloading” (play icon) button to put the tool in standby mode.
- Power Off Phone: Turn off your BQ-5740G Spring completely. If the battery is removable, take it out for a few seconds and put it back in.
- Connect Your Device: Press and hold the Volume Down button on your phone, and while holding it, connect the device to your PC with a USB cable to begin flashing. The process is finished when a green “Passed” message appears.
Warning: This summary omits critical steps. For the complete, illustrated guide, please visit our main article: How to Use the SPD Upgrade Tool to Flash Your Smartphone.
Troubleshooting Common Issues
1. SPD Tool is Stuck on “Checking Baudrate”
Cause: This is the most common problem and is almost always caused by incorrect or conflicting USB drivers. Your PC is failing to establish a stable connection with the phone in flash mode.
Solution: Completely uninstall any other mobile drivers (like MediaTek or Qualcomm) from your computer. Use a utility like USBDeview to remove old driver entries. Reinstall the correct Spreadtrum drivers provided above and restart your computer. Also, try using a different USB port (preferably on the back of the PC) and a high-quality USB cable.
2. Phone is Locked by Google FRP After Flashing
Cause: Factory Reset Protection (FRP) is a security feature on Android 5.1 and newer. If you factory reset a device without removing the Google account, it will require that account’s login upon setup. Flashing the stock ROM does not always remove this lock.
Solution: Specialized Spreadtrum tools or certain versions of the SPD Upgrade Tool have options to format the FRP partition. Alternatively, there are dedicated FRP removal tools designed for UNISOC chipsets. Flashing the stock firmware is the first step, but a separate FRP bypass may be necessary for the BQ-5740G Spring.
3. Performance is Still Slow After a Fresh Install
Cause: The BQ-5740G Spring is an entry-level device with 1GB of RAM. While Android 10 (Go Edition) is optimized, it can still be overwhelmed by modern apps or too many background processes.
Solution: Set realistic expectations. Stick to “Go” and “Lite” versions of apps (e.g., Google Maps Go, Facebook Lite). Avoid running multiple apps at once. Regularly clear the app cache and limit the number of widgets on your home screen. Disable auto-updates in the Play Store to prevent apps from consuming resources in the background.
Frequently Asked Questions (FAQs)
- Why does my BQ-5740G Spring only support 3G?
- The device is built with the UNISOC SC7731E chipset, which is a System-on-Chip designed specifically for cost-effective 3G smartphones. It does not have the hardware (modem) required for 4G LTE connectivity.
- Can I upgrade this phone to Android 11 or 12?
- No. The firmware provided is the last official version released by BQ Mobile for this device. The BQ-5740G Spring did not receive any official major Android version upgrades beyond Android 10.
- Is it safe to flash this firmware?
- Flashing official firmware is generally safe if you follow the instructions precisely. The biggest risks are using the wrong firmware for your device model, a faulty USB connection, or losing power during the process. Always double-check your device model before starting.
- Will this process void the warranty of my BQ-5740G Spring?
- Yes, in most cases, manually flashing firmware is considered an advanced procedure that falls outside of standard consumer use and will void any existing manufacturer warranty.
Conclusion
Restoring your BQ-5740G Spring with the official stock firmware is the best method for resolving complex software issues, from bootloops to system slowdowns. By carefully following the flashing procedure and using the correct tools, you can give your device a clean slate and return it to its original, functional state. Remember to back up your data and follow the full pillar guide for the safest experience.
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