Tools needed: PC, USB-A to USB-A cable, toothpick.
Gently hold the reset button with a toothpick while plugging the other end of the USB cable into the TV box. firmware tv box mx9 4k android 7.1.2
Newer Android versions (9, 10, 11) exist for this hardware, but they are often unstable ports. Stock Android 7.1.2 is: Tools needed: PC, USB-A to USB-A cable, toothpick