If it's detected as an unknown device, it's probably in ADFU mode, i.e. waiting for firmware recovery. However, those old versions of MP3 Player Utilities aren't compatible with these newer devices nor the encryption on the firmware. Someone posted an AK2025 firmware on here before, but it's encrypted and noone's figured out the encryption yet. Your best hope is to read the Chinese MP4 forums like mydigit.cn and see whether they have the newer player utilities yet.
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