The Cubot A40 stock firmware is the original system software provided by the manufacturer. It helps restore your phone to its original state — useful when dealing with boot loops, software crashes, factory reset protection lock, or sluggish performance.
This firmware is specific to your device and ensures proper hardware compatibility and protection. Never install firmware meant for a different variant — it can cause serious issues or even brick the device.
Important Notes
- Back up all data before proceeding
- Follow each step carefully to avoid errors
- Flashing the wrong document may lead to boot issues
- Confirm your variant is Cubot A40 before flashing
Download Links
- CUBOT_A40_F061_V11.0_20250714 – EEA
- SPD Upgrade Tool
- SPD Driver R4.20.0201
- Contact Me for repair, frp, reset, region change & root
Why Use Stock Firmware?
- Fix boot loop or stuck on logo
- Remove factory reset protection lock / Google account
- Recover from software bugs or instability
- Unlock lockscreen or password
- Fully reset and clean the phone
How to Flash Stock Firmware on Cubot A40
- Install USB drivers for your device on the PC
- Extract the downloaded firmware package
- Launch SPD Flash Tool (ResearchDownload/UpgradeDownload)
- Click “Load Packet” and choose the .pac document
- Click the “Start” or Download button
- Power off the phone, then plug in it while holding Volume Up + Down
- Wait for the flashing to complete
- After the process, disconnect the phone and power it on