Please help with my head unit - Android Q&A, Help & Troubleshooting

Hi guys I've a Chinese unbranded android car 2 din unit. It's stuck on boot loader I've watched countless yt videos and I've searched this and other forums for tips but came up with nothing. I've tried a hard reset and tried factory reset and its still stuck on the boot. In the sd card there is no back up or update or upgrade rom or firmware and I know I need it to recover from sd but how do I find one that is compatible with my unit if I don't know the model number or even manufacturer name? It's not printed on the radio and the box was plain. It was a gift from my ex gf almost 2 years ago please can u guys help me out? I've also unplugged it from the car for an hour put it back in. Nothing

anyone?

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