Your phone is demanding an Auth file. This means the DAA check has failed. Ensure you are using a patched "secure boot" DA file. If the error persists, the phone might have the second layer of SLA protection, which is more complex to bypass.
This is usually a driver issue. Ensure your Windows PC has correctly installed the . You can also try disconnecting the phone, removing the battery (if possible), and reconnecting it. oppo a37m da file top
Re-install the signed MTK VCOM Drivers; experiment with a high-quality USB cable or a rear USB 2.0 port. Phone is booting to charging mode instead of VCOM mode. Your phone is demanding an Auth file