We are providing you with a .rar file to reduce the file size. Please note that you need to convert this file to a .zip format.

You have to back up all the data before flashing your device. Before you do so, however, you need to make sure your files, apps, photos, and other important data are backed up flashing firmware can result in loss of data, so backup is a critical first step. If you want to be certain your data is secure before you proceed, you can use cloud services like Google Drive, OneDrive, or a local backup on your computer. Also, ensure that your device has a good amount of battery before starting the flashing process. You also want to have a battery level of at least 50% to prevent any surprises.

Download Required Files

Download the required firmware and tools to flash. You may download the Official Firmware of the OnePlus 3 for your device; however, ensure that the Firmware is only compatible with your phone. Usually, the firmware is available from a legitimate source such as the official OnePlus website, or on a reliable forum for OnePlus device support. Make sure that the download is aligned with the variant (model number) of your OnePlus 3. It’s very easy to brick your device if you install the wrong firmware, so make sure everything is compatible.

Alongside the firmware, you will also require the MsmDownloadTool, which is the exclusive OnePlus tool designed to assist you in flashing firmware on OnePlus devices. The MsmDownloadTool which is used to Flash Firmware on OnePlus devices is usually available on the official OnePlus forums or websites. This tool can be downloaded latest version will avoid errors in the flashing process.

Install Necessary Drivers

Before flashing the device, ensure that you have the USB drivers installed on your PC for the OnePlus 3. These drivers are necessary for your PC to recognize your OnePlus device and communicate with it. The MsmDownloadTool application will automatically install these drivers when you run the program. If you experience problems, you can also try manually downloading the drivers, but make sure to get them from either the official OnePlus website or another trusted source.

Enable USB Debugging

After downloading and installing all the required tools and drivers on your computer, the next step is to enable USB debugging on your OnePlus 3. This is accomplished via the Developer Options menu, which is not visible by default. [ If you need to enable it, head to Settings > About phone and tap the Build number entry (this will usually take about seven taps) several times until you see a message saying you’re now in Developer Options. Then, return to the main Settings menu, select Developer options, and enable USB debugging. This is necessary for your OnePlus 3 to communicate with your PC when connected while doing the flashing process.

Boot into EDL Mode

To start flashing the firmware, you have to put your OnePlus 3 into Emergency Download Mode (EDL Mode) first. In using Recovery mode, is the mode used to recover the device or flash firmware if a boot loop  software problems or improper system upgrades occur. Shut down your OnePlus 3 completely to put it into EDL Mode. Next, when the OPPO logo appears on the screen, press and hold the Volume Up and Power buttons at the same time. Press and hold them for a few seconds until you see the Fastboot logo appear on the screen. This is the correct mode for flashing.   Once you do, connect the OnePlus 3 to your computer via a USB cable.

Run MsmDownloadTool

At this point, you should launch the MsmDownloadTool on your computer. Unzip the MsmDownloadTool ZIP file you downloaded. When the tool is extracted, right-click on the MsmDownloadTool. Exe and click on ”Run as Administrator” to run the tool with the appropriate permissions.

You can then click on the MsmDownloadTool and select the firmware file you previously downloaded. For this navigate to Target and browse to the firmware storage location. Tip: Ensure that the firmware file you are going to choose is the OnePlus 3, flashing the wrong firmware will result in your device being stuck.

Load Firmware

Make sure to start the flashing process only when the MsmDownloadTool is launched and the relevant firmware file is loaded. Press the Start button to flash the firmware to your OnePlus 3. The flashing process will usually take a while, it all depends on firmware size and computer processing speed. It is important to be patient and let the process complete and interrupting it can create issues including bricking of the device.

The MsmDownloadTool will interact with your OnePlus 3, flash the firmware, and check that the flashing is successful as part of this process. Once completed the flashing you will see the confirmation message that the process has been completed.

Wait for Completion

Flashing the firmware on your OnePlus 3 can take several minutes, so make sure to give it time to finish. At this stage, do not remove your device from the port, and do not close the tool. Do Not Interrupt The Flashing ProcessInterrupting the flashing process might corrupt the firmware or cause various issues that can brick your device. Your OnePlus 3 will reboot automatically after completing the flashing process. If that does not occur, you can reboot it manually by holding the power button down for a few seconds.

Complete the Process

The process of flashing the firmware is complete after your OnePlus 3 reboots. Once you have done that, the device boots with the new firmware, and you can start using it as usual. Now, you can take this point to verify that everything works properly. Ensuring no negative impact on the performance or utility of the device and validating the new firmware is working and functional.

Disconnect and Check

After flashing is done, it is completely safe to disconnect your OnePlus 3 from the PC. Decide if your device is working properly and the firmware flashing goes according to plan. You are using data till October 2023.

Final Reminders

Please remember that while the steps mentioned here would work the same way for all OnePlus devices, the same process may vary depending on the exact version and the device model as well. Note: Flashing a phone is no easy task, so always refer to the official documents of the OnePlus community or any trusted forums before starting any flashing method. Before you proceed please note that flashing your OnePlus 3 with a custom ROM or firmware will void the warranty.

If all the steps were followed properly then you should be able to flash the firmware on your OnePlus 3 without any issues. But it should be always recommended that you utilize the official tools and resources that would make this process better and also save you from ruining your device.