How to reinstall Android on a BQ phone: 3 proven methods

Smartphones of the Spanish brand BQ (models Aquaris, Strike, Magic and others) are known for their balance of price and quality, but over time even they begin to slow down or produce errors. Reinstalling Android —a radical but effective way to return the device to its former performance. However, the firmware process BQ has nuances: from choosing the correct software version to taking into account the type of processor (MediaTek or Qualcomm).

In this article you will find 3 working methods flashing, adapted to the specific features phones BQ. We will figure out how to avoid common mistakes (for example, brick with the wrong version of the scatter file for MediaTek), what tools you will need, and how to save important data before the process. If your BQ Aquaris X2 is stuck on the logo or BQ Strike Power is constantly overheating, here you will find a solution.

⚠️ Warning: Smartphone firmware will void the warranty (if it is still valid) and can lead to data loss. Make sure that the battery is charged at least 60% and the USB cable is not damaged - this is critical for the stability of the process.

1. Preparing to reinstall Android

Before starting the firmware, you need to perform 4 mandatory steps: backup, checking the processor model, downloading the firmware and preparing tools. Skipping any of them may lead to device inoperability.

Start with data backup. Even if you plan to flash your phone without resetting it (no wipe), the risk of losing contacts, photos or messages remains. Use: Data backup to a computer via USB (

• 📱 Google Account - synchronize contacts, calendar and notes in Settings → Accounts → Google.
• 🖥️ PC - copy files from internal memory to computer via USB (MTP mode).
• ☁️ Cloud - upload photos to Google Photos or Yandex Drive.
• 🔧 Titanium Backup (requires root) - to save applications and their data.

Next, determine processor model your BQ. The choice of firmware method depends on this:

1. Install the application CPU-Z from Google Play.
2. Open the tab SoC (System on Chip).
3. Remember the manufacturer: MediaTek (starts with MT, for example MT6765) or Qualcomm (series Snapdragon 4xx/6xx).

Downloaded firmware for your model|ADB/Fastboot drivers for PC|USB cable (original)|Battery charge ≥60%|Disabled antivirus on PC-->

⚠️ Attention: Firmware for BQ are often divided into regions (for example, EUR for Europe or RU for Russia). Installing the wrong version may cause problems with the network or language packs. Check the labeling of the firmware file!

2. Method 1: Firmware via Recovery (for beginners)

This method is suitable if your BQ is turned on and you have custom Recovery installed (for example, TWRP). It is less risky than flashing firmware via Fastboot, but requires preliminary preparation.

Step-by-step guide:

1. Download the firmware in format .zip (for example, LineageOS or the official package from BQ).
2. Move the file to the root of the phone's internal memory.
3. Turn off the device and hold down the combination to enter Recovery:
   • For most models BQ Aquaris: Volume Up + Power.
   • For BQ Strike: Volume Down + Power (hold for 10 seconds).

⚠️ Attention: If after rebooting the phone is stuck on the logo for more than 15 minutes, then the firmware does not match yours model. Try a different package or flashing method via Fastboot.

3. Method 2: Flashing via Fastboot (for Qualcomm)

Method Fastboot suitable for smartphones BQ on processors Qualcomm (for example, Aquaris X Pro s Snapdragon 630). It requires unlocking the bootloader, but allows you to install official or custom software.

What you will need:

• 🖥️ A computer with Windows/Linux and installed ADB/Fastboot drivers.
• 📱 Enabled USB debugging (Settings → About phone → Build number (7 taps) → For developers → USB debugging).
• 🔓 Unlocked bootloader (instructions below).
• 📁 Firmware in format .img or .zip with files for Fastboot.

How to unlock the bootloader:

1. Connect the phone to the PC and open the command line in the folder c ADB.
2. Enter the commands one by one:

   adb reboot bootloader
   fastboot oem unlock

3. On the phone, confirm the unlocking (data will be erased!).

Firmware via Fastboot:

1. Unpack the firmware into the folder c fastboot.exe.
2. Connect the phone in Fastboot (hold Volume Down + Power with the device turned off).
3. Run the file flash-all.bat (for Windows) or enter the commands manually:

   fastboot flash boot boot.img
   fastboot flash system system.img
   fastboot flash recovery recovery.img
   fastboot reboot

4. Method 3: Firmware via SP Flash Tool (for MediaTek)

Smartphones BQ on processors MediaTek (for example, BQ Aquaris U2 s MT6753) are flashed through the utility SP Flash Tool. This method is more risky, as it requires the correct scatter file and can lead to brick in case of an error.

Step-by-step guide:

1. Download and install SP Flash Tool (version 5.2 or later).
2. Unpack the firmware and find the file MTxxxx_Android_scatter.txt (where xxxx is the processor model).
3. Run flash_tool.exe as administrator.
4. Click Scatter-loading and select scatter file.
5. Make sure all the checkboxes are correct (usually Preloader it’s better not to touch!).
6. Turn off the phone, connect it to the PC without battery (if removable) or with the button held down Volume Down.
7. Click Download in the app and wait until the end (a green circle appears).

⚠️ Attention: If the process is stuck on DA 100%, turn off the phone, reinstall the drivers MediaTek Preloader and try again. Do not under any circumstances interrupt the firmware during the recording stage Preloader - this is a guaranteed brick!

5. Where to download firmware for BQ

Official firmware for BQ can be found on the manufacturer's website, but often they are only available for new models. For outdated devices (for example BQ Aquaris E5), you will have to look for custom assemblies.

Reliable sources:

• 🌍 BQ official website — support section (Support → Software Updates).
• 📥 4PDA — thematic threads on models (for example Aquaris X2).
• 🔄 Needrom - firmware database for MediaTek.
• 🤖 XDA Developers - custom firmware (LineageOS, Resurrection Remix).

⚠️ Warning: When downloading firmware from third resources, check the hash files (MD5 or SHA-1) and read reviews. Viruses in firmware are rare, but fake packages may contain adware.

For models on Qualcomm look for files with the extension .mbn or .img, for MediaTek —archives with scatter file. Pay attention to the Android version: for example, BQ Aquaris X officially supports up to Android 9, and custom firmware may offer Android 11-12.

6. Frequent problems after reinstalling Android

Even if the firmware was successful, problems may occur. Here are the most common ones and ways to solve them:

Problem 1: The phone does not see the SIM card

• 📶 Check whether the firmware supports your modem model (for example, for BQ Strike Power you need a version with EUR or RU modifier).
• 🔧 Reflash only the partition modem via Fastboot:

  fastboot flash modem NON-HLOS.bin

• 📞 Insert the SIM into another slot (if available).

Problem 2: Rapid battery drain

• 🔋 Calibrate the battery: completely discharge the phone, then charge it to 100% without interruption.
• 🛠️ Check background processes in Settings → Battery.
• 🔄 Install a kernel with an optimized power consumption (for example FrancoKernel for Qualcomm).

Problem 3: Sensors (gyroscope, compass) do not work

• 🔄 Reflash the partition persist (if it is in the firmware).
• 📲 Install the application Sensor Test from Google Play for diagnostics.
• 🔧 Update sensor drivers via Fastboot (files usually come with the name sensors*.img).

AT +EGMR=1,7,"IMEI_1"
AT +EGMR=1,10,"IMEI_2"

7.

Brick (inoperative device) is the worst outcome of unsuccessful firmware. To avoid it, follow these rules:

Rule 1: Check firmware compatibility

• 📋 Check the phone model and processor version. For example, firmware for BQ Aquaris X (Snapdragon 630) will not be suitable for BQ Aquaris X2 (Snapdragon 636).
• 🔍 Look for the firmware by the exact model name (indicated on the box or under the battery).

Rule 2: Do not interrupt the process

• ⚡ Use a laptop with a charged battery or UPS - a power outage during the firmware is fatal.
• 🔌 Do not touch the USB cable and do not move the phone.

Rule 3: Make backups of critical partitions

• 💾 Save copies EFS, modem and persist via TWRP or ADB:

  adb pull /dev/block/mmcblk0p3 efs.img

• ☁️ Upload a backup to the cloud - in case of data loss on your PC.

Rule 4: Use proven tools

• 🛠️ For MediaTek: only the latest version SP Flash Tool (5.2+).
• 🖥️ For Qualcomm: official QFil or Mi Flash Tool (suitable for many models).
• 🚫 Avoid “universal flashers” - they often contain malicious code.

FAQ: Answers to frequently asked questions