Sp9853i 1h10 Vmm Firmware Update -

Posted by: The Embedded Dev Team
Date: April 21, 2026

If you are reading this, chances are you have a device based on the UNISOC SP9853i chipset (Think Cat S42, Doogee, or a rugged industrial handheld) and you have encountered the cryptic string: 1h10 vmm. sp9853i 1h10 vmm firmware update

We recently received a bricked device that refused to boot past a black screen, only showing up in Device Manager as Unknown USB Device (SP9853i 1h10). After weeks of reverse-engineering, here is everything we learned about updating the VMM firmware on this platform. Posted by: The Embedded Dev Team Date: April

VMM_SP9853i_1H10_3.2.1_20241015_signed.bin If possible, dump current VMM: fastboot flash dump_vmm

If possible, dump current VMM:

fastboot flash dump_vmm (if supported)

Or use SP Flash Tool → Readback → Address: 0x0F000000 length: 0x200000 (2 MB).