Enter Samsung Galaxy J4 into Download Mode (Odin mode) using simple steps tutorial. The universal method for entering the downloading mode is by pressing hard buttons. But what if your button is not working or is broken. Don’t worry as in that case you can still boot your Galaxy J4 into download mode. Here in this step by step guide, we’ll use 4 different techniques to easily boot Galaxy J4 into download mode.

How to Boot Galaxy J4 into Download Mode

Download mode is mainly used to flash stock firmware, gain root access, flash custom recovery, flash custom ROM, boot loader, kernels, modems, pit files, system update etc.

How to Enter Samsung Galaxy J4 into Download Mode

Here we have mentioned 4 different ways to enter your Galaxy J4 into download mode. You may refer any one of them. Note that the below mentioned methods are applicable on all variants of Samsung Galaxy J4 including SM-J400F, SM-J400G/DS and SM-J400F/DS.

Method 1: Using Hard Keys

Step 1: Power off your device completely until it vibrates.

How to Boot Galaxy J4 into Download Mode

Step 2: Press and Hold Volume Down key + Home button + Power button simultaneously until you see a warning message. Leave all the keys as you see the warning message window.

How to Boot Galaxy J4 into Download Mode

Step 3: Now just press Volume up button to continue.

How to Boot Galaxy J4 into Download Mode

This will directly boot your Galaxy J4 into download mode.

How to Boot Galaxy J4 into Download Mode
That’s all! You’ve successfully booted your Galaxy J4 into download mode using hard keys.

Method 2: Using ADB commands

Step 1: Enable the USB debugging mode on your device. For doing that, follow the path Menu->Settings->Developer options ->USB debugging. If you don’t see Developer option then go to Settings->About Phone and tap 7 times on the Build number. This will make the Developer option appear in the Settings menu.

How to Boot Galaxy J4 into Download Mode

Step 2: Enable OEM unlocking and Advance reboot mode from Developer options.

How to Boot Galaxy J4 into Download Mode

Step 3: Download and install ADB and Fastboot setup on your PC.

Step 4: Next using USB cable, connect your phone to PC.

Step 5: Launch Command window on your PC. For doing that, hold Shift button and right mouse click anywhere on your PC. You’ll see a list of options from which select Open command window here option. This will launch the command prompt window.

How to Boot Galaxy J4 into Download Mode
How to Boot Galaxy J4 into Download Mode

Step 6: To ensure that your phone is properly connected to PC, type the following command in the command window and press enter key:

adb devices

How to Boot Galaxy J4 into Download Mode

As soon as you press enter key, you’ll see a message saying ‘List of devices attached’ along with some random numbers. This will confirm that your Galaxy J4 has properly connected to your PC.

How to Boot Galaxy J4 into Download Mode

Note: If such thing doesn’t happen, then re-install device drivers, enable USB debugging mode and try again. If the problem still persists, try changing USB cable or even the USB port.

Step 7: Now to enter your Galaxy J4 into download mode, type the following command in the command window and hit enter key:

adb reboot download

How to Boot Galaxy J4 into Download Mode

As soon as you hit enter key, your Galaxy J4 will restart into download mode.

Method 3: Using Terminal Emulator (Requires ROOT)

Step 1: Download and install Terminal Emulator App from Google Play Store.

Step 2: Launch Terminal Emulator App.

How to Boot Galaxy J4 into Download Mode

Step 3: Type this command in it and press enter key:

su

How to Boot Galaxy J4 into Download Mode

Step 4: As soon as you hit enter key, a popup will appear to grant Superuser permissions. So click on Grant option.

How to Boot Galaxy J4 into Download Mode
How to Boot Galaxy J4 into Download Mode

Step 5: On the next line type the following command and press enter key:

reboot download

How to Boot Galaxy J4 into Download Mode

As soon as you press enter key, your Galaxy J4 will enter into download mode.

Method 4: Using Quick Reboot App (Requires ROOT)

Step 1: Download and install Quick Reboot app from Google Play Store.

Step 2: Launch Quick Reboot app.

How to Boot Galaxy J4 into Download Mode

Step 3: Tick the ‘I have read and accept the terms’ and click on confirm.

How to Boot Galaxy J4 into Download Mode

Step 4: To boot into downloading mode, click on the Fastboot mode option.

How to Boot Galaxy J4 into Download Mode
How to Boot Galaxy J4 into Download Mode

Step 5: Then Tap on Yes to confirm.

How to Boot Galaxy J4 into Download Mode

Step 6: As soon as you click on Yes, a popup will appear to grant Superuser permissions. So hit the Grant option.

How to Boot Galaxy J4 into Download Mode
How to Boot Galaxy J4 into Download Mode

That’s all! You’ve successfully booted your Galaxy J4 into download mode using Quick Reboot app.

How to Exit Download Mode on Galaxy J4

  • For Android phones with a removable battery, you just need to open the back panel, remove and re-insert the battery and then normally start the phone by pressing Power button.
  • For non-removable battery phones, long press + hold the Power button to exit the download mode and restart the device.
  • For phones with Android 6.0 Marshmallow and above OS, Google has introduced new process to exit the Download mode. For that you need to press and hold Power button + Volume Down key + Volume Up key + Home button simultaneously until your phone restarts.
I hope that this clear things up on how to enter and exit your Samsung Galaxy J4 into Download Mode.
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