: The default MTK_AllInOne_DA.bin file lacks the required security keys for your specific processor model.
The most common culprit is the driver. Windows often installs the wrong driver automatically. sp flash tool stuck at download da 100
If your phone has a removable battery, pull it out for 30 seconds, reinsert it, but . : The default MTK_AllInOne_DA
The MediaTek boot ROM requires a clean power cycle to reset its connection status after a failed flash attempt. Unplug the phone from the USB cable. pull it out for 30 seconds
If the process fails at 100% when using "Firmware Upgrade", it may be failing during the pre-processing check. Select in the dropdown menu instead.