Q1. Why should I downgrade to Android 6.0.1 from the official Android 7.1.1 update?

Many users found that the official update to Nougat introduced significant battery drain and caused the camera performance to degrade. This Android 6.0.1 firmware is widely considered by the user community to be the most stable and power-efficient version for the Aquaris U Plus.

Q2. My fingerprint scanner is slow and often fails to recognize my finger. Will this help?

Yes, it often can. A clean firmware installation restores the original drivers and calibration software for the fingerprint sensor. For best performance after flashing, be sure to delete your old fingerprints and carefully re-register them in the security settings.

Q3. The camera seems to take worse photos after I updated my phone. Will this fix it?

Yes. Reverting to this original Marshmallow firmware will also restore the original, highly optimized camera software and image processing algorithms. Many users found this version's camera performance to be superior to that of the later Nougat update.

BQ Aquaris U Plus Firmware (Stock ROM) | Downgrade to Android 6.0.1

The BQ Aquaris U Plus is a well-built mid-range smartphone from 2016, featuring a 5-inch HD display, a reliable Qualcomm Snapdragon 430 chipset, and a metal body. It originally launched with Android 6.0.1 Marshmallow and later received an official update to Android 7.1.1 Nougat. However, many users found this update to be problematic, reporting a significant increase in battery drain, a decline in camera quality, and general instability. As a result, many owners seek to **downgrade their device back to this original, stable Android 6.0.1 firmware**. This guide provides the official stock ROM to perform this downgrade or to unbrick a device and resolve other software issues.

⚠️ CRUCIAL WARNING: Advanced Flashing and Downgrade Risk
This firmware is primarily used to **downgrade** from the buggy Android 7.1.1 Nougat update. Downgrading can be risky and may fail if your device’s bootloader has been updated. The process uses the advanced Fastboot method, requires an unlocked bootloader, and will completely erase all your personal data.

⚠️ Prerequisites: Before You Begin

Click Here for the Essential Pre-Flashing Checklist

Backup Your Data: This process will wipe everything on your phone’s internal storage.
Charge The Battery: Ensure your phone has at least a 60% charge to prevent it from shutting down during the process.
Windows PC & USB Cable: You will need a Windows computer and the phone’s original micro USB cable.
Unlock Bootloader: Your device’s bootloader must be unlocked to flash firmware via Fastboot.

📱 Quick Device Specifications

Device: BQ Aquaris U Plus
Chipset: Qualcomm Snapdragon 430 (MSM8937)
Display: 5.0″ HD IPS (1280×720)
Operating System: Android 6.0.1 Marshmallow
RAM: 2GB / 3GB
Storage: 16GB / 32GB
Battery: 3080 mAh

🛠 Required Tools & Downloads

File / Tool	Download Link
ADB and Fastboot Platform Tools	Download from Google
Qualcomm HS-USB QDLoader Drivers	Download Drivers

⬇️ BQ Aquaris U Plus Stock ROM / Firmware

OS Version	Build Number	Chipset	Download Link
Android 6.0.1 Marshmallow	1.3.0	Qualcomm Snapdragon 430	Download (MediaFire)

Quick Steps to Flash BQ Aquaris U Plus Firmware

Download and install the Qualcomm drivers. Download and extract the ADB/Fastboot Platform Tools and the firmware ZIP file (BQ_Aquaris_U_Plus_..._20161017.zip) into the **same folder**.
Power off your phone completely. Reboot it into Fastboot Mode by pressing and holding the Power + Volume Down buttons simultaneously until you see the Fastboot menu.
Connect your phone to your PC via USB cable.
Inside the folder where you extracted the files, find and double-click the `flash-all.bat` script to run it.
A command prompt window will open and automatically begin the flashing process. Do not unplug the phone or close the window.
The script will flash all necessary partitions and the phone will reboot automatically once the process is complete.

❓ Frequently Asked Questions (FAQs)

Q1. Why should I downgrade to Android 6.0.1 from the official Android 7.1.1 update?: Many users found that the official update to Nougat introduced significant battery drain and caused the camera performance to degrade. This Android 6.0.1 firmware is widely considered by the user community to be the most stable and power-efficient version for the Aquaris U Plus.
Q2. My fingerprint scanner is slow and often fails to recognize my finger. Will this help?: Yes, it often can. A clean firmware installation restores the original drivers and calibration software for the fingerprint sensor. For best performance after flashing, be sure to delete your old fingerprints and carefully re-register them in the security settings.
Q3. The camera seems to take worse photos after I updated my phone. Will this fix it?: Yes. Reverting to this original Marshmallow firmware will also restore the original, highly optimized camera software and image processing algorithms. Many users found this version’s camera performance to be superior to that of the later Nougat update.

🔧 Device Troubleshooting

The `flash-all.bat` script fails, especially when downgrading: If the script fails, it may be because the bootloader from a newer Android version is preventing the flash. Ensure your bootloader is unlocked. If it still fails, the downgrade may not be possible on your specific device, which is an inherent risk of the process.
My phone is not detected in Fastboot mode: This is a driver issue. Ensure you have installed the Qualcomm and ADB drivers correctly. You can check the connection by opening a command prompt in the firmware folder and typing `fastboot devices`. If a serial number appears, you are connected.
After flashing, the phone is stuck on the BQ boot animation: The first boot can take a long time (up to 20 minutes). If it’s still stuck, you must perform a factory reset. Boot into recovery mode (Power + Volume Up), then navigate to “Wipe data/factory reset” and confirm.