Taliso Sousa

Hello everyone,
I’m trying to flash a firmware on a generic Android TV Box and I’m stuck at a hardware/bootloader compatibility issue.
Device technical details:
- SoC: Allwinner H618
- Board / PCB: FX-H618-D4_V10
- RAM: 4GB DDR4
- Storage: eMMC (unknown size, likely 32GB)
- USB FEL ID: VID_1F3A PID_EFE8
- Original OS: BigdroidOS (Android generic)
- Commercial name: Transpeed 8K618-T
Current situation:
- Device enters FEL mode correctly (VID_1F3A PID_EFE8)
- PhoenixSuit detects the device but firmware upgrade hangs at “Beginning Firmware Upgrade”
- Tried multiple PCs (Windows 10 and 11), different USB ports and cables
- Allwinner FEL driver installed correctly
- SD card flashing with PhoenixCard (Startup mode) is ignored, device boots normally to Android
- Reset timing variations tested (short press / long press / no reset)
Tested firmware:
- sbx_transpeed_h618_atv_12_11.img
- H618.apollo-p3.T-H618_100M_12_FD650.2023.09.13.1720.img
Both firmwares show similar behavior (FEL detected but no successful flash).
I believe the issue is bootloader / DDR4 initialization mismatch.
I’m specifically looking for:
- A firmware confirmed to work with board FX-H618-D4_V10
- Or the original BigdroidOS firmware dump for this board
- Or confirmation whether this board requires a specific boot0/boot1
Any help, working firmware, or dump from the same board would be greatly appreciated.
Thank you!
 
 
Allwinner H618, FX-H618, DDR4, PhoenixSuit, FEL, Transpeed