Connect the other end to the specific USB port on the TV box designated for flashing (usually USB-1). Step 4: Flash the Firmware
Enhanced dual-band Wi-Fi (2.4GHz/5GHz) and more reliable Bluetooth 4.0+ connectivity. Performance Fixes: Rk3229 Android 9.0 Firmware
In device/rockchip/rk3229/rk3229.mk :
A: Your bootloader resolution is wrong. You need to edit the parameter.txt file before flashing to force 1280x720 as the kernel display buffer. Connect the other end to the specific USB