SP Flash Tool Stuck at Download DA 100%? Hereās the Ultimate Fix Guide If you are reading this, you have likely been staring at your computer screen for the past 20 minutes, watching a progress bar refuse to budge. You are trying to flash a stock ROM, unbrick a Mediatek (MTK) Android device, or install a custom recovery. You loaded the scatter file, clicked "Download," connected your phone... and then it happened. The SP Flash Tool log window displays: "Download DA 100%" ... and nothing else. This is one of the most frustrating errors in the Android modding community. Fortunately, it is also one of the most fixable. This article will explain why this happens and provide ten proven solutions to get you past the 100% barrier.
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 phoneās 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:
SP Flash Tool sends the DA to the phone (0% to 100%). DA executes on the phone . DA negotiates the USB connection for high-speed data transfer. 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). Why does this happen? sp flash tool stuck at download da 100
USB Driver Issues: The wrong or outdated Mediatek drivers are installed. USB Port/Cable Problems: Poor power delivery or data corruption. Preloader Conflicts: The phone's preloader is in a weird state. Wrong DA File: Some phones require a specific, patched DA. Memory Test Failure: The DA tries to initialize the eMMC/UFS storage and fails. Battery Level: The phone shuts down mid-DA execution due to low power.
Part 2: The Quick Checklist (Do this first) Try these three basic fixes before diving into advanced settings. They solve 50% of cases.
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). 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). 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. SP Flash Tool Stuck at Download DA 100%
Part 3: 10 Advanced Fixes for "Download DA 100%" If the checklist didn't work, proceed systematically. Fix #1: Install/Reinstall Mediatek USB Drivers (The VCOM fix) The most common culprit is the Preloader USB VCOM Port driver. Windows often installs the wrong driver automatically.
Download: Latest Mediatek DA USB VCOM drivers (search for "MTK USB Driver v1.0.8" or similar). Action:
Open Device Manager on Windows. Connect your powered-off phone via USB. Look for "Mediatek USB Port" or "Unknown Device" that appears for 5 seconds, then disappears. You must act fast. Right-click it -> Update driver -> Browse my computer -> Let me pick . Select Mediatek DA USB VCOM Port (or "USB Serial Device" if that fails). Disable Driver Signature Enforcement on Windows 8/10/11 before installing. and nothing else
Fix #2: Use a Different Version of SP Flash Tool Newer phones often require newer tools, but conversely, newer tools break older phones.
For MT67xx, MT65xx phones: Use SP Flash Tool v5.16 or v5.18. For MT67xx, MT68xx, Helio P/G series: Use SP Flash Tool v5.20 or v5.21. For Dimensity series (MT6833, MT6873 etc): Use the latest available version (v5.24+). Pro Tip: Keep three versions on your hard drive (Old, Stable, Latest) and rotate through them.