PhoenixSuit isn't the only tool available, but it is the most versatile. There's also , which is an Ubuntu-based equivalent, and PhoenixUSBpro , a Windows tool for batch-flashing multiple devices simultaneously.
Use this method if the unit is stuck in a boot loop or if you have a full .img firmware file. How to Update Android TV Box Firmware Manually allwinner t8 firmware update
Most Allwinner T8 units update via an external storage slot. PhoenixSuit isn't the only tool available, but it