Updating the firmware on your Amlogic S905L2-based device can be a straightforward process, but it requires careful attention to ensure a successful outcome:
: Necessary for connecting your TV box to a Windows PC. amlogic s905l2 firmware
Several firmware options are available for the Amlogic S905L2, each with its own strengths and weaknesses: Updating the firmware on your Amlogic S905L2-based device
This is the most reliable method for "unbricking" a device or performing a clean install. TX3 Mini S905L2-B Firmware request - Armbian forum amlogic s905l2 firmware
If your device still boots to the home screen, use this simpler method. Amlogic USB Burning Tool Recovery Guide: Revised Tutorial
CoreELEC does not support Android apps. It overwrites the entire NAND.