: The Windows operating system loses track of the MediaTek VCOM or Preloader driver right as the DA phase ends.
Using a generic DA file on a device with a Secure Boot requirement.
The latest version of SP Flash Tool (v5.x or v6.x) isn't always the best for older phones. Newer tools often have incompatible Download Agents.
(like MCT Bypass or LibUSB) to disable the security check before clicking "Download" in SP Flash Tool. Troubleshooting Steps Restart the process: sp flash tool stuck at download da 100
The wrong Download Agent file is being used for your specific chipset.
Right-click, select "Update Driver," and choose the MTK VCOM drivers you downloaded.
: Use a high-quality, short data cable. Cables designed only for charging lack the internal shielding required for flashing firmware. 5. Change the Software Download Speed Setting : The Windows operating system loses track of
Newer SP Flash Tools (v5.20+) allow you to choose a specific Download Agent.
This usually indicates a communication issue between the SP Flash Tool and the MediaTek device during the firmware flashing process. Common causes and fixes include:
If you have performed all seven phases and the bar remains frozen at "Download DA 100%" for more than two minutes, your phone’s eMMC chip has likely developed bad blocks or died completely. The DA loads, pings the memory, gets no response, and freezes. In this case, the only fix is a hardware repair: reballing the eMMC, replacing the chip, or using a JTAG programmer. For most users, this means the phone is beyond software repair. Newer tools often have incompatible Download Agents
When SP Flash Tool gets stuck at Download DA 100%, it means the computer has sent the Download Agent (DA) to the phone, but the device and the software have failed to establish the secure, secondary communication link required to begin flashing the actual firmware.
Changing the flash mode can reset the DA handshake.
If your device requires auth_sv5.auth file (found in stock ROM's MTK_AllInOne_DA.bin ):
The battery might be too low or, conversely, should be removed for the connection.