Plug the USB drive into one of the USB slots of your head unit.
If your device boots straight into its old lagging system or remains stuck on the boot loop without triggering the installation screen: sp9853i 1h10 vmm firmware update full
Insert the FAT32-formatted USB drive containing the root recovery files into the primary USB port. Plug the USB drive into one of the
On some forums, users advise only updating the system file and not the MCU (Microcontroller Unit) file to avoid conflicts. The MCU manages hardware functions, and updating it with an incompatible version can cause errors like an "MCU don't match" message. then release it immediately.
Keep holding the reset button down for until the display illuminates with an upgrade notification window, then release it immediately.