Anyone looking for a reason to root the Samsung Galaxy S4 SPH-L720 these days should look at the Viper4Android application. As the smartphones in the Samsung range continue to evolve, there are root applications out there that can help transform your old hardware and features into something that’s better, almost as if your device has received an upgrade of a certain kind.

Specifically, the Viper4Android application focuses on improving your sound quality, offering a variety of new options to tweak your sound to the max. It will let you listen to your favourite songs with a much more refined sounds that you could ever get from the standard amplifier, let alone smartphone.

Samsung Galaxy S4

The rooting file in this guide made by Chainfire is based on LRX22C.L720VPUGOH1 firmware which is part of a regional roll out for Android 5.0.1 Lollipop. It doesn’t matter what language or region that same firmware rolled out to because you do not need to flash it on your device before using the guide. The firmware build ID is given by Chainfire to us to use as an indicator only. He says that some Samsung devices like the Samsung Galaxy S4 will not boot old images if this gets old.

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

  1. Download the new CF-Auto-Root file for the Samsung Galaxy S4 SPH-L720 on Android 5.0.1 from here.
  2. You will find a version of the Odin flashing tool is bundled with the rooting exploit. If that version doesn’t want to flash for your device, try downloading a different version and trying again.
  3. You are choosing to void the warranty of your Samsung Galaxy S4 SPH-L720 when you follow this guide. You can flash the stock ROM for the SPH-L720 from Sam Mobile and it will unroot and make the warranty work again. Just make sure you are installing the right stock ROM for your region or else it might brick your device.

Rooting the Samsung Galaxy S4 SPH-L720 running on the Android 5.0.1 Lollipop update

  1. Enable the USB Debugging Mode on your Galaxy S4 SPH-L720 smartphone.
  2. Download the rooting exploit for the S4 device directly to the Windows PC and extract the file to your desktop.
  3. Right-click on the mouse on the Odin executable file and choose to run your flashing tool as an administrator.
  4. Do not make any changes from the default settings you get into the Odin application.
  5. Turn off your Samsung Galaxy S4 device and reboot to download mode using the hardware key combination for that mode.
  6. Connect the Samsung Galaxy S4 to the computer with the USB cable.
  7. Wait for a few seconds for the ID; COM port to light up a green color. No green color means the device is not connected and you will need to download and install the universal Windows ADB drivers for your computer and try again.
  8. Click the AP button from the Odin user-interface and browse the desktop for the rooting package.
  9. Once loaded, click the Start button and it will now flash that rooting file to your Samsung Galaxy S4.
  10. Wait until your Galaxy S4 says it is restoring the stock recovery, cleaning up and then rebooting in 10 seconds.

The Samsung Galaxy S4 smartphone with the SPH-L720 model number will now reboot in recovery mode; this happens automatically because Chainfire has programmed it that way. It’s also an essential part of the rooting procedure and if it doesn’t happen to your S4, it will not be rooted yet. Anyone who does not reach recovery will need to manually boot the Samsung Galaxy S4 to recovery mode after the flashing finishes.

In conclusion, that’s how to root the Samsung Galaxy S4 smartphone with the SPH-L720 model number. You can install the root checker application from the Google Play Store if you want to double check it did work for your device.