The BQ Aquaris A4.5 is a compact Android One smartphone released with robust build quality, dual-SIM capability, and a quad-core MediaTek chipset. If experiencing boot issues, performance lag, or missing network/SIM detection, flashing the official ROM below can restore your device to full function and stability.
Quick Device Specs
- Model: BQ Aquaris A4.5
- Chipset: MediaTek MT6735M, quad-core 1.0 GHz
- RAM: 1 GB
- Storage: 16 GB (expandable via microSD up to 64 GB)
- Display: 4.5″ IPS LCD, 960 x 540 px
- Battery: 2470 mAh Li-polymer
- Camera: 8 MP rear, 5 MP front
- OS: Android 6.0 Marshmallow (upgradeable from Android One)
- Special: Dual-SIM, FM radio, 4G LTE
Required Downloads
- SP Flash Tool (latest version recommended)
- MTK/MediaTek USB Drivers
- BQ_Aquaris_A4.5_MT6735_161215_6.0.zip (firmware below)
Official Firmware Download
| Device | Build/Version | Type | Download |
|---|---|---|---|
| BQ Aquaris A4.5 | MT6735_161215_6.0 | Official Scatter ROM | Download 6.0 (Google Drive) |
How to Flash Firmware on BQ Aquaris A4.5 (MTK)
Use SP Flash Tool for Mediatek to restore or unbrick your A4.5. The process will erase everything—back up first. You’ll need Windows, proper drivers, and matching scatter files. Step-by-step, illustrated instructions can be found in our master tutorial:
How to Flash Stock Firmware to MediaTek (MTK) Smartphones using SP Flash Tool
Device-Specific Troubleshooting for BQ Aquaris A4.5
- Device is stuck on boot or fails to start: A long-press on Power or a full SP Flash Tool re-flash usually solves this. Always use the exact matching scatter firmware and remove SD/SIM during flash.
- Poor display or touch response: After flash, clear the display and digitizer. Rarely, non-original screens may limit touch precision.
- Battery drains too fast or won’t charge: Replace original charger and cable, reboot, and try battery calibration. If battery still underperforms, consider a battery replacement.
- SIM/network not detected or IMEI lost: Use *#06# to check IMEI post-flash. Lost numbers must be restored via MediaTek SN Writer with your original values or backup.
- OS stuck on older Android or system glitches: Always update to the latest available firmware for stability; full instructions for upgrades and fixes are in the user guide.
FAQs
Q1. Does flashing the ROM erase everything?
Yes, flashing wipes internal storage. Always make sure personal files are backed up first.
Q2. Can the BQ Aquaris A4.5 be restored from a dead/bootlooped state?
Usually, yes—if your PC recognizes the phone, SP Flash Tool can recover it as long as hardware is intact.
Q3. What if the device won’t connect to PC for flashing?
Install all correct drivers and try another USB port/cable. Enable device detection mode. Some PCs may need driver signature enforcement disabled for full MTK driver compatibility.
Q4. How to recover IMEI after flashing?
Use SN Writer or equivalent tools to restore; IMEI backup before any firmware update is strongly advised.
Q5. Upgrade fails or lags remain after firmware?
After flashing, do a factory reset and keep only essential apps installed—1 GB RAM limits heavy usage. For frequent or heavy lag, keep usage basic and install only lightweight apps.
Need detailed visuals? Use our comprehensive MTK flashing tutorial, or contact BQ support if persistent issues remain after restore.
