Q1. My BQS-4570 Drive gets very hot and the battery dies in just a few hours. Can firmware fix this?

This is the most common complaint for this model. A clean firmware flash can fix software-related causes of overheating and battery drain by removing rogue processes. However, due to the very small 1600 mAh battery, overall battery life will still be limited even after the fix.

Q2. The error "Unfortunately, System UI has stopped" keeps popping up. How do I stop it?

This critical error is a sign of deep software corruption that a factory reset often cannot fix. The only reliable solution is to reinstall the entire operating system by flashing the stock firmware provided in this guide.

Q3. The touchscreen becomes unresponsive, especially when the phone is hot. Is it a hardware issue?

It could be, but it's often a software driver problem that is made worse by heat. Flashing the stock firmware is a crucial first step as it restores the original touchscreen drivers and can resolve this unresponsiveness if it's not a physical hardware failure.

BQ Mobile BQS-4570 Drive Firmware (Stock ROM)

The BQ Mobile BQS-4570 Drive is a compact 4.5-inch smartphone from 2017, designed as an entry-level device running Android 5.1 Lollipop. Due to its minimal hardware and small battery, users have frequently encountered specific, significant issues. The most common complaints include severe overheating during normal operation, extremely rapid battery drain, and persistent “Unfortunately, System UI has stopped” errors that can render the phone unusable. For users experiencing these problems or dealing with a bootloop, flashing the official stock firmware is the definitive solution to restore the device’s software to a clean, functional state.

ℹ️ Important Note:
This phone is powered by a MediaTek MT6580 chipset. The flashing process requires the SP Flash Tool and will completely erase all your personal data. Ensure you have backed up any important files before you begin.

⚠️ Prerequisites: Before You Begin

Click Here for the Essential Pre-Flashing Checklist

Backup Your Data: All your contacts, photos, and files on the phone’s internal storage will be permanently wiped.
Charge The Battery: To prevent the phone from shutting down during the update, ensure the battery is charged to at least 50%.
Windows PC & USB Cable: You will need a Windows computer and a standard micro USB cable to perform the flash.

📱 Quick Device Specifications

Device: BQ Mobile BQS-4570 Drive
Chipset: MediaTek MT6580
Display: 4.5″ IPS (854×480)
Operating System: Android 5.1 Lollipop
RAM: 1GB
Storage: 8GB
Battery: 1600 mAh (Removable)

🛠 Required Tools & Downloads

File / Tool	Download Link
SP Flash Tool	Download Tool
MediaTek USB VCOM Drivers	Download Drivers

⬇️ BQ Mobile BQS-4570 Drive Stock ROM / Firmware

Android Version	Build Date	Chipset	Download Link
5.1 Lollipop	2017-03-21	MediaTek MT6580	Download (MediaFire)

Quick Steps to Flash BQS-4570 Drive Firmware

Download and install the MediaTek VCOM drivers. Extract the firmware ZIP file (BQ_BQS-4570_..._21032017_5.1.zip) and the SP Flash Tool on your PC.
Launch flash_tool.exe. Click the “Scatter-loading” button and select the MT6580_Android_scatter.txt file from the extracted firmware folder.
Ensure the flashing mode in the dropdown menu is set to “Download Only.”
Power off your phone and remove the battery. Click the green “Download” button in SP Flash Tool, then connect the phone to your PC via USB cable (without the battery).
The flash will start automatically. Once you see the green checkmark pop-up, you can disconnect the phone, re-insert the battery, and power it on.

For a more detailed, step-by-step guide on this process, please refer to our main tutorial:
👉 Full Tutorial: How to Flash MediaTek Firmware with SP Flash Tool

❓ Frequently Asked Questions (FAQs)

Q1. My BQS-4570 Drive gets very hot and the battery dies in just a few hours. Can firmware fix this?: This is the most common complaint for this model. A clean firmware flash can fix software-related causes of overheating and battery drain by removing rogue processes. However, due to the very small 1600 mAh battery, overall battery life will still be limited even after the fix.
Q2. The error “Unfortunately, System UI has stopped” keeps popping up. How do I stop it?: This critical error is a sign of deep software corruption that a factory reset often cannot fix. The only reliable solution is to reinstall the entire operating system by flashing the stock firmware provided in this guide.
Q3. The touchscreen becomes unresponsive, especially when the phone is hot. Is it a hardware issue?: It could be, but it’s often a software driver problem that is made worse by heat. Flashing the stock firmware is a crucial first step as it restores the original touchscreen drivers and can resolve this unresponsiveness if it’s not a physical hardware failure.

🔧 Device Troubleshooting

The phone is not detected by SP Flash Tool: The removable battery simplifies this. Ensure the VCOM drivers are installed, click “Download” in SP Flash Tool, remove the battery from the phone, and then connect the phone to the PC without the battery inside. This is the most reliable connection method for this chipset.
A system update (OTA) failed and now the phone is stuck on the BQ logo: This is a common failure. The only way to recover is to manually flash the full stock firmware using this guide, which will overwrite the corrupted files from the failed update.
I get a “PMT changed for the ROM” error in SP Flash Tool: This error means the partition layout is mismatched. To fix this, change the flashing mode in SP Flash Tool from “Download Only” to “Firmware Upgrade” and try the process again.