The screen went dark. Then the Atoto logo reappeared, cheerful and blue, and the radio started playing a classic rock station like nothing had happened.
: Unplug phones from the unit and disconnect Bluetooth to prevent interruptions during the process. atoto f7 firmware download repack link
: Unzip the downloaded folder and copy the "update" subfolder and any required .bin files (like LTTMcu.bin ) directly to the root directory of the USB drive. The screen went dark