ATV 1900AC/1800/582/380 Android 5.1 Beta Firmware - 028/06/17 Here is the Beta Firmware to upgrade your ATV 1900AC/1800 series/582/380 to Android 5.1 You can install this using an SD Card or USB drive and the upgrade app listed in the settings area. This does not require manually pressing the reset button. Just extract the IMG file from the zip folder and move it to a USB drive or SD Card that is formatted to FAT32. **PLEASE NOTE THIS WILL FACTORY RESET YOUR DEVICE**