Firmware ~upd~ - Hktrt2843p639

This translates the requests of the Android OS into actual electrical impulses, telling the specific LCD panel how to display color and controlling the voltage pushed to the LED backlights. The Perils of Resolution and Panel Matching The most fascinating aspect of analyzing the HK.T.RT2843P639

If web UI is inaccessible:

binwalk -e hktrt2843p639.bin