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Sp Flash Tool Stuck At Download !!better!! Da 100 [ ESSENTIAL ]

If you are trying to unbrick or flash your MediaTek (MTK) device and the SP Flash Tool is stuck at "Download DA 100%", you are stuck at the most common hurdle in Android flashing.

When the progress bar hits 100% (usually red or purple) and refuses to turn yellow, it means the tool has sent the Download Agent (DA) to the phone, but the phone isn't talking back.

Here is how to break through that 100% stall and get your flash moving. 🛠️ Quick Hardware Checks

Before diving into software settings, ensure the physical connection is solid.

Change the Cable: SP Flash Tool is notoriously picky about USB cables. Use the original "fast charging" cable that came with the device.

Swap USB Ports: Avoid USB 3.0 (blue ports) or USB hubs. Plug directly into a USB 2.0 port on the back of your PC motherboard.

The Battery Trick: If your device has a removable battery, take it out, wait 10 seconds, put it back in, and try again without turning the phone on. 💻 Fix 1: Update Your VCOM Drivers sp flash tool stuck at download da 100

The "DA 100%" hang is almost always a driver handshake issue. Your PC sees the device, but it hasn't established the MediaTek USB VCOM port correctly. Open Device Manager on your PC.

Connect your phone (powered off) while watching the "Ports (COM & LPT)" section.

If you see "MTK USB Port" or "Preloader USB VCOM" appear and then disappear with a yellow triangle, your drivers are outdated or unsigned.

Action: Download and install the latest MTK All-in-One Drivers. If you are on Windows 10 or 11, you must Disable Driver Signature Enforcement before installing. 📂 Fix 2: Use the Correct Download Agent (DA)

The default MTK_AllInOne_DA.bin included with SP Flash Tool doesn't work for every phone, especially newer models or those with Secure Boot. In SP Flash Tool, look at the Download Agent field. Click Choose.

Try selecting different DA files from the SP Flash Tool folder. If you are trying to unbrick or flash

Note: If you have a Xiaomi, Oppo, or Vivo device, you likely need a Custom DA file specific to your model to bypass the security check. ⚙️ Fix 3: Match the Connection Settings

Sometimes the tool is trying to talk to the phone at the wrong "speed."

Part 1: Understanding the "Download DA 100%" Error

Before smashing your keyboard, let's decode what "DA" means.

DA stands for Download Agent. Think of the DA as a small, temporary operating system that the SP Flash Tool uploads to your phone’s RAM. Its job is to take over from the phone's boot ROM and handle the actual writing of data (system, boot, recovery) to the flash memory.

The process flow is:

  1. SP Flash Tool sends the DA to the phone (0% to 100%).
  2. DA executes on the phone.
  3. DA negotiates the USB connection for high-speed data transfer.
  4. Flashing begins.

If you are stuck at "Download DA 100%," it means the SP Flash Tool successfully sent the DA file to the phone (Step 1 is complete), but the phone cannot execute the DA or cannot handshake back to the computer (Step 2 or 3 failed). Part 1: Understanding the "Download DA 100%" Error

5. Preloader or Bootrom Issues

If the device’s preloader is corrupted, the phone may not respond correctly after receiving the DA. In some cases, you need to use a custom DA or bypass authentication (for newer MTK devices like G-series or Dimensity).

4. Incorrect Scatter File or DA

Using a Download Agent (DA) that doesn’t match your chipset (e.g., using an MT6577 DA for an MT6795) or a mismatched scatter file will cause a freeze at 100%.

Fix #9: Run SP Flash Tool with Administrator Rights + Windows 7 Compatibility

Windows 10/11 can block the raw USB access that the DA needs.

  1. Right-click flash_tool.exe -> Properties.
  2. Go to Compatibility tab.
  3. Check "Run this program as an administrator".
  4. Check "Run this program in compatibility mode for:" -> Select Windows 7.
  5. Click Apply and restart the tool.

Phase 2: The "Download Only" vs "Firmware Upgrade" Toggle

Many users blindly click "Download". Try this:

  1. Open SP Flash Tool.
  2. Select your scatter file.
  3. In the top menu, change the dropdown from "Download Only" to "Firmware Upgrade".
  4. Click "Download".
    • Why this works: "Firmware Upgrade" sends a different command sequence to the DA, bypassing certain authentication checks. If you are stuck at 100%, this often kicks the process to 100% complete instantly.

3. Battery or Power State

Some MediaTek devices refuse to enter download mode properly if the battery is too low, too high, or if the device is powered on. Many models require the battery to be around 50-70% and the device completely powered off.

Part 2: The Quick Checklist (Do this first)

Try these three basic fixes before diving into advanced settings. They solve 50% of cases.

  1. Change the USB Cable: Do not use a charging-only cable. Use a high-quality data cable (a short USB 2.0 cable works best).
  2. Change the USB Port: Avoid USB 3.0 (blue) ports and front-panel ports. Use a USB 2.0 port directly on your motherboard (at the back of a desktop PC).
  3. Change the Connection Timing: Disconnect the phone battery (if removable). Click "Download" in SP Flash Tool first, then connect the USB cable. For newer phones with non-removable batteries, hold Volume Down or Volume Up while connecting.