[Samsung Galaxy J3 (2017) Guides, News, & Discussio] ashyx:
Welcome to the root guide thread for the SAMSUNG J327T/T1 GALAXY J3 PRIME

This guide will show you how to root the J3 prime 2017, Exynos 7570 released by Tmobile and MetroPCS.

If you choose to follow the steps below, you should be aware of the risks.

While minimal, neither myself or thepcwiz101 accept any responsibily for broken devices.

Unfortunately this device has a locked bootloader and root so far has been elusive for this device. Many have tried different methods to no avail.

Finally it is here.

Through much research by [MENTION=6722106]thepcwiz101[/MENTION] we came by a method that uses an ENG firmware to gain root. Basically this firmware is an engineering firmware with the su binary already installed which can be used to leverage some scripts to gain proper root with Supersu.

I went on the hunt for this firmware and found it.

Then we needed a method to push Supersu to the ENG firmware.

The Samsung S8/S8+ already used a similar method to root that device, so I took the script they used called SamPWNED and modified it to work for this device. We'll call this SamPWNED32.

Please see credits below for more info.

[MENTION=6722106]thepcwiz101[/MENTION] did most of the testing along with a few others and finally we had success.

To see how we got here you can refer to the thread below:

https://xdaforums.com/galaxy-j3-2017/help/samsung-galaxy-j3-prime-sm-j327t1-t3604860

Follow the steps below and at the end of it you should have a rooted device.

I strongly advise backing up all your settings and personal data before continuing. YOU HAVE BEEN WARNED!

Smartswitchmobile can be used to back up apps and settings to an SDCARD.

https://play.google.com/store/apps/details?id=com.sec.android.easyMover&hl=en_GB

************** INSTALLATION STEPS **************

Step 1.

Download the required files:

http://www.mediafire.com/file/s6hn38hb5wkiqsw/J327T_J327T_J327TUVU1AQC3_ROOT.zip

Step 2.

Unpack the package you downloaded above.

Put your device in DOWNLOAD mode (POWER + HOME + VOL DOWN)

Run Prince Comsey ODIN

Click the AP button then locate the ODIN flashable file you downloaded in the package named:

J327T_J327T1_J327TUVU1AQC3-eng.tar

Tick NAND Erase All

Leave all other ODIN options at default then click START.

Wait for the files to finish flashing and your device reboots. Disconnect the USB cable then remove the battery.

Force boot to recovery by holding POWER + HOME + VOL UP.

In recovery select Factory Reset then reboot the device.

Put the device to one side, have a coffee and wait a good ten minutes or so for the device to boot.

Step 3.

Once your device has fully rebooted you will be running the engineering firmware. This firmware isn't really good for a daily driver, so we're only using it to gain root.

Plug in the USB cable.

Your device should have USB debugging already enabled and a pop up should ask you to accept the connection to your PC. Accept the pop up to enable USB debugging for your PC.

Step 4.

Now to begin the root process.

Locate the root.bat file in the SamPWND32_Root folder and double click it to run it.

You should see a bunch of stuff on the screen as it does it thing and then your device should reboot.

When your device reboots you should now be rooted with SuperSU!

Step 5.

As mentioned in Step 3, this firmware isn't really good as a daily driver, so we're going to replace it with the stock firmware using Flashfire.

Download the stock firmware for your device from https://updato.com

Download Flashfire from the Play store: https://play.google.com/store/apps/details?id=eu.chainfire.flash&hl=en_GB

Download the Supersu system mode root package: https://xdaforums.com/attachment.php?attachmentid=4289379&d=1506893064

Step 6.

Run Flashfire and agree when it asks for root permission.

In the main screen tap the + button then select Flash firmware Package and locate the stock firmware package you downloaded.

IMPORTANT: Uncheck the BOOT partition. Leave the rest enabled. Tap the tick top right when done. in the next screen tap EverRoot and uncheck Inject SuperSU and Preserve recovery. Tap the tick top right when done.

In the main screen again tap the + and then select Flash zip or OTA and locate the SR5-SuperSU-v2.82-SYSTEMMODE.zip

Check Mount /system read/write and leave everything else unchecked and then tap the tick when done.

Check you have the following selected on the main screen:

Flash Firmware package - The stock firmware with BOOT disabled.

Flash zip or OTA - System mode Supersu

EverRoot - disabled

Reboot - Normal

Ensure that System mode supersu is last on the list after the firmware or it won't root the new firmware.

Now tap FLASH and let Flashfire do it's thing.

When your device reboots you should be rooted and running the stock firmware.

If your devices suffers a kernel panic at any point take the battery out and reboot. Give it time and your device should stabilise.

I suggest factory resetting after performing the above procedure as this may make your device more stable if it's clean and fresh.

There is also an updated eng boot binary posted below which may help.

Hopefully you now have a fully rooted device.

View attachment 4447438

IMPORTANT NOTE:

THE DEVICE STILL HAS A LOCKED BOOTLOADER. DO NOT ATTEMPT TO FLASH A CUSTOM RECOVERY OR ANYTHING THAT MODIFIES THE BOOT PARTITION. DO NOT REPLACE THE BOOT IMAGE EITHER.

DOING ANY OF THE ABOVE WILL SOFT BRICK THE DEVICE.

CREDITS:

ME(ashyx)

[MENTION=6722106]thepcwiz101[/MENTION]

[MENTION=3812611]elliwigy[/MENTION] and the SamPWNED devs (To donate or see who was involved in creating SamPWNED see this link, they deserve the credit for creating it.)

https://xdaforums.com/galaxy-s8+/development/root-g955u-g955u1-snapdragon-sampwnd-t3658911

[MENTION=631273]Chainfire[/MENTION]

[MENTION=3563392]mauam[/MENTION] for System mode Supersu

Anyone that tested.

PLEASE DO *NOT* DIRECT LINK TO THESE FILES. PLEASE LINK TO THIS POST

DONATE ME HERE IF YOU WANT TO BUY ME A BEER/COFFEE OR HIT THE THANKS BUTTON IF I HELPED YOU