Fly B400
Fly B400 is a Fly firmware file listed under Fly, distributed as Fly_B400_MT6227_V22_081027_FMTK.zip with a download size of 10.84 MB. It was published on June 16, 2026. It is available to download free of charge. Before flashing, verify the file matches your exact device model and back up your data.
About Fly B400
Sometimes a clean firmware install is the best fix for a misbehaving phone. For Fly B400 owners, this page hosts the original Fly stock ROM and the key file details. Whether an update corrupted the system or a root attempt went wrong, the factory ROM puts the Fly B400 back to square one. File Name: Fly_B400_MT6227_V22_081027_FMTK.zip File Size: 10.84 MB Copy your data somewhere safe, top up the battery, grab a working USB cable, and confirm the proper drivers are set up before you start. When it finishes, the Fly B400 restarts with clean factory software. Match the firmware to your variant and follow each step in order.
File Details
| File name | Fly B400 |
|---|---|
| Package | Fly_B400_MT6227_V22_081027_FMTK.zip |
| Brand / Platform | Fly |
| Category | Fly |
| File size | 10.84 MB |
| Date added | June 16, 2026 |
| Price | Free |
How to use this file
- Confirm Fly B400 matches your exact device model and that it is intended for Fly hardware.
- Back up your personal data, as flashing firmware can erase the device.
- Download the file (10.84 MB) using the button above.
- Use the appropriate flashing tool for your platform and follow the on-screen steps.
- Keep the device charged and connected until the process completes.
Frequently asked questions
Is Fly B400 free to download?
Yes, Fly B400 can be downloaded free of charge from this page.
How large is the download?
The Fly B400 package is 10.84 MB.
Which devices is this firmware for?
This file is intended for Fly devices. Always confirm it matches your specific model before flashing.