In the field, load the custom secure DA file provided with your Vivo firmware or use the default MTK_AllInOne_DA.bin .
If your device is simply stuck in a boot loop but can still enter , I can help you find a standard firmware flash file instead, which is much safer and easier to use. YouTube·GSM Phone Repair
gdb /path/to/original/binary y81_dump_file.y81 y81 dump file
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The phone must be connected via pinouts or by removing the eMMC chip and placing it in a socket. In the field, load the custom secure DA
An advanced hardware box used for high-speed data transfers to UFS and eMMC memory structures. Software Tools
The of the phone (e.g., won't turn on, stuck on logo, or password locked)? This link or copies made by others cannot be deleted
: Programming a new flash memory chip when the original hardware fails. Partition Repair