It is important to manage expectations. The Egreat R300 is a "RTOS" (Real-Time Operating System) player. It does not run Android.
You will encounter two types of firmware: Egreat R300 Firmware Download
This guide covers everything from identifying your hardware version to the technical installation process and troubleshooting. It is important to manage expectations
If you want, I can:
If you'd like to for this device (like custom apps or a new UI), let me know: Are you looking to modify the existing Android side ? Egreat R300 Firmware Download