Before downloading any files, you must verify the specific "Build Number" or "MCU Version" of your device. Installing the wrong firmware can "brick" the unit (render it completely unfunctional). Go to > System > About Device . Take a photo of the MCU Version and Kernel Version . How to Install Firmware on the Mtech 8803 1. Preparation
If the unit becomes completely unresponsive (bricked), you may need to short specific pins on the mainboard (J1 and J2) to force a safe boot. Consult MTech service manual or a qualified technician. Firmware Mtech 8803
Here are some possible sources for the firmware: Firmware MTech 8803: The Ultimate Guide to Updates,