Rooting the Samsung Galaxy S6 smartphone is what every owner needs to do if they ever want to use the device with free control. When you get the Galaxy S6’s operating system based on Android coming to you out of the box, you get some features but also a bunch of functions that are locked away unable to be used. Those elements are made to come back to life after we unshackle the chains with a rooted operating system. Like most things in life, there is a downside to our indulgences. With regards to overindulging in an open operating system, we leave ourselves more open to viruses and being exposed to malware should be let our guards down.

There is no additional security we can install to help us with this problem. The SuperSU app or the KingUser app is the only thing we need for the safety because it does an excellent job at blocking everything in its path, but the way we need SuperSU to work relies on human choices. It is us who need to choose whether or not we want to open the gate and let an app have root access on our system. We can want to block everything, and nothing will get let through. Alternatively, we can allow everything through including potential threats if we do not know how to identify them. For the most part, identifying a risk is easy: you either installed an app a minute ago or you did not. Anything that you do not recall installing or that you do not remember the name of should be immediately stopped by clicking on the button that does not allow it to have root access when you get the pop-up message on the display. Those are the times when you could have just saved yourself from having malware on your device. Of course, there are other times when you need to be careful too. Those times I am talking about are the times when you need to figure out what is a trusted app and what isn’t before you choose to install the app. Awareness is key here. You should be researching the names of apps and reading reviews on the apps before you install anything. If you are not 100% sure that the app you are about to install is safe then do not risk it. It is not worth it.

Samsung Galaxy S6

The apps that are trusted are easy to see. These are the apps that make the lists of the best root apps for Android 2016 and so forth. These are the root apps that hold value to your Samsung Galaxy S6 smartphone, and when you see some large websites writing reviews on these root apps I am talking about, you know there is nothing to worry about. For example, you are aware that installing Titanium Backup, Xposed, Greenify, ROM Manager and the ROM Toolbox are all safe to install because you trust them, and you know the developers are trustworthy. You know this because you see reviews and recommendations about these apps all over the internet. That is no coincidence. However, anything that has hardly any reviews from the app store or the official web page that it is being hosted, or any app that has not made it onto any of the listicles I am talking about floating around the internet is an app that you may need to ve wary about.

The following guide that includes the CF-Auto-Root tool is based on the MMB29K.G920R4TYU3CPB4 firmware build number. That is the build that the developer used to root the device. However, it does not mean you need to be running the same firmware build number on your smartphone before you can use this guide. Those are the words coming from the developer Chainfire himself. He just gives that build number along with the rooting file for people to use as an indicator because there are times when some Samsung devices will not boot the older images.

What Is Rooting the Android Operating System?

When you buy a new smartphone, you might not know it, but the Android operating system is in a “locked” state. For the most part, it will not make much difference to you: most apps are still available to use, and there are benefits to this locked state such as better security. When you root the Android operating system, you are gaining full administrative rights over the OS.

Why Would You Want to Root Android?

Gaining full administrative rights over the operating system has some perks to some people. For example, out of the millions of applications available on Google Play, some of them will not be able to run on your device unless it has root access. Until you have a specific need for wanting Android rooted, you probably want to leave Android as it comes out of the box. But if you need to unlock an app, then that is when you want to look into rooting methods. Using more apps is only one example of why you may want root access, here is the full list of benefits:

  • Unlock more applications. Some of the apps available for Android cannot run unless you have root access. This is because the app’s features cannot run without the root permissions because the features require the full system access before they can be useful.
  • Better battery life. Smartphones are great, but they have one caveat, which is each time you recharge the battery, it loses some of its overall lifespan. That means smartphones, in general, do not make great investments, and if your weekly paycheck is low, you will want to limit the number of smartphones you go through. One of the ways you can do that is by removing bloatware and creating a better battery life.
  • Bolster performance. If you are the budget-conscious shopper, you may want to increase the device’s performance. This can be done by removing the bloatware as well. The more processes you have running, the more memory that is used. By removing some of the apps, it can help lighten the load on your hardware.
  • Customize Android with themes. With root access, you can download and install any theme that’s at your disposal. That includes any customized theme you can find.

What Are the Risks of Rooting?

If you are buying a smartphone that is not running iOS, then it is probably the Android operating system that you want running as the ideal software to pair with your shiny new hardware. It is, in fact, the Android OS that offers you the chance to customize the OS considerably more than iOS: custom themes, run any app you know about, the works. For many users, the “openness” of an operating system is important, because it offers them more freedom which means running into fewer problems with their investments. But there is a reason iOS likes a far more locked approach: the ability to customize is not for everyone, and if you do not know what you are doing it can lead to a lot of problems which can define your time with the OS rather than freedom.

With power (full admin permissions) comes greater responsibility. Here are some of the main risk factors when it comes to rooting:

  • Malware becomes a larger threat. You might read the occasional news article about how new malware is wreaking havoc in parts of the world on Android. But the Android operating system with root access becomes considerably more vulnerable to exploits because applications are no longer prisoned off in their own sandbox environments. This means if you accidentally download malware, it can do more damage because it can spread throughout the operating system and even jump into other applications and potentially view sensitive data.
  • You can accidentally brick the smartphone. There is always a chance that you end up bricking the smartphone before you had the opportunity to use it with root access. That is because if you are going to brick it, it is going to happen during the rooting process.
  • You may void the warranty. Most manufacturers do not allow you to root the Android operating system and still get to bring it in for repairs under warranty. Whether they are legally meant to do that or not is another question, but it is now common knowledge that most do not want to help you if they find out you have unlocked the OS with root access.

Files You Need

  • Download the new CF-Auto-Root tool version made for the Galaxy S6 SM-G920R4 when it is running on the Android 6.0.1 Marshmallow software update from here.
  • Download the Samsung USB Drivers for the Galaxy S^smartphone on the computer from here.

The following guide is made for the US Cellular version of the Samsung Galaxy S6 smartphone that comes with the SM-G920R4 model number when it is running on the Android 6.0.1 Marshmallow software updates. You will need the US Cellular version with the SM-G920R4 model number to use this guide or else you will likely brick it. You can check your model number is the same by tapping on the Menu > Settings > About Device > Model Number.

Note that there may be some Android software updates that roll out to your US Cellular Samsung Galaxy S6 smartphone that update it to newer versions of Android. Some of those updates can bring new bootloader with them, and a new bootloader gives us some temporary problems that need addressing by the developer of the rooting tool. Once he gets his hands on the recovery image files, he can then apply the updates, so the rooting files work again. For him to be able to do that, he relies on people who use the tools to submit the new recovery image to the official CF-Auto-Root tool thread he has made over at the XDA-Developers website. Once he sees the files, he will apply the updates. Those updates are always automatically reflected in our guides when we link directly back to the CF-Auto-Root tool repository.

Rooting the Samsung Galaxy S6 SM-G920R4 running on the Android 6.0.1 Marshmallow software updates

  1. Unlock the Developer Options menu on the Samsung Galaxy S6 smartphone so you can use it in the following step.
  2. Tun on the USB Debugging Mode from the Developer Options menu that you just unlocked.
  3. Extract the rooting bundle to the desktop of the Windows computer so you can use the files that are inside.
  4. Run the Samsung USB Drivers on the computer so your device can connect to the network and be detected by the flashing tool during the guide.
  5. Turn off the Galaxy S6 smartphone by pressing the Power button and pressing the button that says it will shut down the device completely from the menu.
  6. Boot the Samsung Galaxy S6 smartphone by pressing and holding the hardware key combination for the download mode, so it is in the download mode and ready for the flashing.
  7. Connect the Samsung Galaxy S6 smartphone to the computer with the USB cable that you would usually use to charge the battery on the smartphone.
  8. Wait for about five seconds and then check that you get a yellow or blue color coming from the ID: COM port on the Odin user interface along with a message that tells you that your phone is added. (These signs are letting you know that your Samsung drivers are working and that your phone is ready for the flashing so now it is time to upload your files).
  9. Click the AP button from the Odin user interface and browse the desktop of the computer for the rooting file that is ending in the tar.md5 file extension.
  10. Do not change any of the default settings coming from the Odin user interface.
  11. Click the Start button from the Odin user interface and then wait without touching any buttons for the smartphone to be rooted.
  12. Look at the display of the S6 smartphone and you should see some text rolling down the screen in a few seconds telling you that it is installing the SuperSU, cleaning up the cache partition and then reflashing the stock recovery on your phone.
  13. Check the Odin user interface on your computer for when it gives you a new green box with a pass message inside which is letting you know that you are safe to unplug from the computer and start using your rooted handset.

In conclusion, that is how to root the Samsung Galaxy S6 smartphone from US Cellular that comes with the SM-G920R4 model number when you have it running on the Android 6.0.1 Marshmallow software updates by using a newer version of the CF-Auto-Rot tool by Chainfire. The version of the CF-Auto-Root tool that is available in this guide should work for all versions of the Android 6.0.1 Marshmallow update; however, there are no guarantees that it will work for any of the other updates that roll out in the future when it is updated to newer versions of Android, so you should look out or a new guide when it is available.You can check that everything went to plan on your Galaxy S6 phone by installing one of the many root checker apps available from the Google Play Store. The root checker app comes in a free version, and that is all you need to check if your device is rooted or not. The paid version if up for grabs by anyone who wants more features for when the time comes when you think you can make use of them.

Any Samsung Galaxy S6 smartphone owners who are unable to get the guide to work for them can try out a couple of everyday things. The first thing people should check it whether to not the device is getting into the recovery mode after the flashing completes. The time between the flashing starting and the flashing ending is very quick, so it is easy not to see the part where it gets into the recovery mode. However, one of the most common issues is a device not going into recovery mode when then doesn’t allow for the SuperSU to be enabled and installed correctly. That is why the Odin app might say pass, but the root checker app says it failed. You can rectify that problem by pressing and holding the hardware button combination for the recovery mode manually after the flashing completes and that will fix the SuperSU problems much the same way the automatic recovery booting up would have during the guide.

Moreover, anyone who is still facing issues can just install one of the other versions of the Odin flashing application. The Odin app saw a few releases–each without any official changelog attached–and all versions can root your Samsung Galaxy S6 smartphone. It is assumed that the later versions of the Odin app will be the best to use, but there are always reports online from sources like YouTube videos where some people try one version of Odin, it does not work, so they try another version, and it does work. You can install any of the older versions of Odin from our Odin flashing tool download page and give them a try.