: Using the original OnePlus DASH USB cable is highly recommended, as generic cables frequently fail to maintain the stable connection required for low-level flashing.
While holding the buttons, connect the phone to the PC via USB.
Right-click the executable file and select to open the user interface.
Download the OnePlus 3T MsmDownloadTool V3.0. oneplus 3t unbrick tool
Restart your computer to ensure the driver installation is fully registered by the system. Step 2: Extract the Unbrick Tool Package
: Necessary for your PC to communicate with the bricked device. Unbricking Procedure Prepare your PC : Install the Qualcomm drivers.
The tool cannot establish a secure link with the device or the drivers are conflicting. : Using the original OnePlus DASH USB cable
The , officially known as the MSM Download Tool , is a proprietary Windows utility used to revive a "hard bricked" device that cannot boot into Android, recovery, or fastboot. This tool communicates with the device's Qualcomm processor in EDL (Emergency Download) Mode to re-flash factory firmware. Essential Preparation
Extract the contents of the OnePlus 3T Unbrick Tool archive to an easily accessible folder on your local hard drive.
This error indicates a communication failure between the tool and the phone. Unplug the device, hold the Power button for 20 seconds to reset it, and retry entering EDL mode. Ensure you are running the tool as an administrator. Status: Waiting for Device Download the OnePlus 3T MsmDownloadTool V3
Disconnect the phone, hold the Power button for 20 seconds to completely reset the chip, and put it back into EDL mode using the volume keys. Rapidly click "Start" on the tool right after plugging the cable in. Tool Stuck on "Param Pre-processing"
You will need to download a verified unbrick package. Ensure you select the package that matches your specific device region (OxygenOS or HydrogenOS firmware variants).
Click the button located in the upper-left corner of the program interface.
Follow these instructions precisely to safely flash the factory firmware back onto your device. Step 1: Install the Qualcomm Drivers
If you encounter issues during the process, consult these common fixes: Device Not Detected (No COM Port)