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If You sure (sim210), so why you got no ca found after repaired your box with bootloader for sim210?
Then try to flash new image not bootloader, new image with " 3-Fix Bad Sector "Sectors Recovery" and choose right image for your sim and box (DM800se-Sim210) not for (DM800) by using optiFlasher...
Then try to flash new image not bootloader, new image with " 3-Fix Bad Sector "Sectors Recovery" and choose right image for your sim and box (DM800se-Sim210) not for (DM800) by using optiFlasher...