If your unit is stuck in a boot loop and you cannot access Android, check the sticker on the mainboard (requires opening the dashboard). The label often says "K2001n REV 2.0" or similar.
: The device will restart automatically. Do not remove power during this time, as it can "brick" the unit. Important Considerations Hardware Matching : Ensure your unit is an Allwinner T3 K2001N K2001n Nwd Firmware