How to Boot Into Samsung Galaxy S3 Download Mode

There are multiple methods to boot your Galaxy S3 into download mode. The most handy (and hardware coded) method is about pressing a combination of keys for a few seconds on your Galaxy S3. Others are software based, let’s have a look them below:

1) Boot into Galaxy S3 Download Mode Using HARDWARE BUTTONS

This method is a fail-proof method that’ll always work for you, unless you’ve broken one of hardware keys. In such a case you’d be left with only the other two methods discussed below.

How to Boot Samsung Galaxy Devices to Download Mode

  • Power off your device and wait for 5-10 seconds until the device is fully switched off.
    └ This is completely optional. You can choose to keep the device switched On if you wish to
  • Press and hold  ‘Volume Down + Home + Power’ buttons together and release them once a Warning screen shows up on your device
  • Press ‘Volume Up‘ to accept the warning and boot into download mode

2) Boot into Galaxy S3 Download Mode Using ADB

ADB stands for Android Debug Bridge, a tool used to send terminal commands to a Android device via a PC command line. ADB requires a bit of setup, but it gets the job done with much lesser effort than hardware buttons, so pretty useful in cases when you’ve to boot in download mode frequently. Also, if (for some reason) your hardware buttons aren’t working than this is a very good alternative to boot into download mode.


And make sure you’ve proper drivers installed for your device. You can download driver from this page →

  • Extract the file (ADB files for Download you downloaded from the link above to a separate folder on your computer
  • Prepare your phone
    • Enable developer options: Go to your phone’s Settings » select About phone » Scroll to the bottom and tap on ‘Build number’ seven times to enable developer options
    • Enable USB Debugging: Open phone’s Settings » select Developer options » Tick the ‘USB debugging’ checkbox (under Debugging section)
  • Connect your phone to PC with a USB cable and if/when a pop-up screen shows up on Phone asking you to ‘Allow USB debugging?‘ for the computer, make sure you tick the checkbox and tap OK
    Allow USB Debugging
  • Open the folder where you extracted the files and double-click/run the ‘Boot into Download Mode.bat‘ file to reboot your device into download mode
    └ If the script shows any error than that means either your device is not connected or you don’t have proper driver for your device installed on your PC. For help with driver, check this page →

FYI, the ‘Boot into Download Mode.bat‘ script file that we used above to boot your device into download mode just uses one line of command:

adb reboot bootloader

If you already have ADB setup on your computer and you know how to use it, then you may just use the command given above to boot into download mode.

3) Boot into Galaxy S3 Download Mode Using Quick Boot (Reboot) APP

Yes! There’s an app for rebooting your phone into download mode, and it’s more easier than the methods we discussed above. But it won’t work unless you’ve root access on your device, and since not everyone roots their device, we’ve put this as the last method here.


  • Install the Quick Boot (Reboot) app from Play Store on your Galaxy S3  |  Play store link →
  • Open the app and grant Root Access
  • Select ‘Bootloader‘ from the list of options and it’ll boot your device into download mode

That’s all.


If you have any questions or suggestions, feel free to let us know in the comments section below. We’d love to hear your feedback.

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