Common causes include:
: Your computer may not have the Mediatek VCOM drivers installed or configured correctly. Device Manager
The loaded scatter file does not match the device's partition map.
:
Corrupted, missing, or incorrect MediaTek USB VCOM drivers. sp flash tool stuck on download da 100
Right-click the flash_tool.exe and select Run as Administrator . Change the Download Agent: Go to the Download tab. Click the Choose button next to "Download Agent".
Download a trusted, open-source (such as MCT MTK Auth Bypass). Launch the bypass utility and click Bypass .
If your device has a secured bootloader (like many Xiaomi, Oppo, or Realme MTK phones), you use a specific custom DA file matching your phone model.
:
: Try different button combinations while connecting the USB cable: Volume Down , or both. Alternative
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If the phone’s internal storage is physically failing or has bad blocks, the DA will handshake to 100% but fail to mount the user data area. You need to test the eMMC.
A faulty USB cable, USB 3.0 port incompatibilities, or a loose charging port. Common causes include: : Your computer may not
Avoid USB 3.0 (blue) ports; use USB 2.0 instead.
Click in SP Flash Tool before connecting the USB cable.
In SP Flash Tool, uncheck all partitions except preloader , boot1 , and boot2 . Flash only those. If that succeeds, flash partitions one by one. A dying eMMC can sometimes be flashed in small chunks.