Q1. My Aquaris X5 battery life became terrible after updating to Android 6.0. Will this help?

Yes, this is the most common complaint for this model. A clean flash of the stock Marshmallow firmware, followed by wiping the cache partition from recovery, is the best way to solve software-related battery drain. It removes any conflicting files left over from the previous OS version.

Q2. The phone gets really hot, especially when using mobile data. Is this normal?

While some warmth is expected, excessive heat is often caused by software bugs. Reinstalling the official firmware ensures the system is running efficiently and can significantly reduce software-related overheating by closing any rogue background processes.

Q3. Can I flash the Cyanogen OS firmware on this phone, or vice-versa?

It is strongly not recommended. While the hardware is nearly identical, the partition layout and device identifiers can be different. Flashing the wrong variant's firmware can lead to a bricked device. You should only use this firmware for the standard Android BQ Aquaris X5.

BQ Aquaris X5 (Android Version) Firmware (Stock ROM)

The BQ Aquaris X5 is the standard Android version of the popular 2015 smartphone, a counterpart to the Cyanogen Edition. It features the same premium metal design and reliable Qualcomm Snapdragon processor but runs BQ’s stock Android 6.0.1 Marshmallow software. Users of this specific variant have reported common issues over the years, most notably a significant decrease in battery life after the Marshmallow update, overheating during 4G data use, and unstable Wi-Fi connections. For users looking to resolve these software bugs or restore a bricked device, performing a clean flash of the official stock firmware is the definitive solution.

⚠️ CRUCIAL WARNING: Advanced Flashing Method
This guide is for the standard Android version of the BQ Aquaris X5, not the Cyanogen Edition. This procedure uses the Fastboot method, which requires an unlocked bootloader and will completely erase all your personal data. Proceed with caution.

⚠️ 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 X5 (Standard Android Version)
Chipset: Qualcomm Snapdragon 412 (MSM8916T)
Display: 5.0″ HD IPS (1280×720)
Operating System: Android 6.0.1 Marshmallow
RAM: 2GB
Storage: 16GB
Battery: 2900 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 X5 Stock ROM / Firmware

OS Version	Build Number	Chipset	Download Link
Android 6.0.1 Marshmallow	4.5.0	Qualcomm Snapdragon 412	Download (MediaFire)

Quick Steps to Flash BQ Aquaris X5 Firmware

Download and install the Qualcomm drivers. Download and extract the ADB/Fastboot Platform Tools and the firmware ZIP file (BQ_Aquaris_X5_4.5.0_..._0934.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 the `flash-all.bat` script. Double-click this file to run it.
A command prompt window will open and the flashing process will begin automatically. Do not unplug the phone or close the window.
The script will flash all the necessary partitions and the phone will reboot automatically once the process is complete.

❓ Frequently Asked Questions (FAQs)

Q1. My Aquaris X5 battery life became terrible after updating to Android 6.0. Will this help?: Yes, this is the most common complaint for this model. A clean flash of the stock Marshmallow firmware, followed by wiping the cache partition from recovery, is the best way to solve software-related battery drain. It removes any conflicting files left over from the previous OS version.
Q2. The phone gets really hot, especially when using mobile data. Is this normal?: While some warmth is expected, excessive heat is often caused by software bugs. Reinstalling the official firmware ensures the system is running efficiently and can significantly reduce software-related overheating by closing any rogue background processes.
Q3. Can I flash the Cyanogen OS firmware on this phone, or vice-versa?: It is strongly not recommended. While the hardware is nearly identical, the partition layout and device identifiers can be different. Flashing the wrong variant’s firmware can lead to a bricked device. You should only use this firmware for the standard Android BQ Aquaris X5.

🔧 Device Troubleshooting

The `flash-all.bat` script gives an error or closes immediately: This usually means Fastboot is not set up correctly. Ensure that the ADB/Fastboot tools and all the extracted firmware files (especially the `.img` files) are in the exact same folder as the script. Also, verify your phone is properly connected in Fastboot mode.
My phone is not detected in Fastboot mode: This is a driver issue. Ensure you have installed the Qualcomm and ADB/Fastboot drivers correctly. You can check if the device is recognized by opening a command prompt in your Fastboot folder and typing `fastboot devices`. If it shows a serial number, you are connected.
After flashing, the phone is stuck on the BQ boot animation: The first boot can take a very long time (up to 20 minutes). Be patient. If it is still stuck, you need to perform a factory reset. Boot into recovery mode (Power + Volume Up), then navigate to “Wipe data/factory reset” and confirm.