Root on Android: what it is and why you need it

Many smartphone owners have heard the mysterious word “root” or root access, but not everyone understands what exactly is hidden behind this term. Essentially, rooting is the process of jailbreaking your device's operating system, giving the user complete control over the file system. In normal state Android restricts access to critical sections to protect the system from accidental or malicious changes.

When you become a superuser, you actually gain administrator rights, similar to the rights root in operating systems family Linux. This opens the door to limitless customization possibilities, but at the same time removes many layers of protection provided by the manufacturer. Superuser rights allows you to remove system applications, change the processor frequency and deeply customize the interface.

However, before deciding to take this step, you need to weigh the pros and cons. The procedure for obtaining root access does not always go smoothly and can lead to loss of warranty or the phone being turned into a “brick.” In this article, we will analyze in detail why you need it root access, what tools are used for this and what consequences should be prepared for.

The essence of root access and the difference from the normal mode

In the standard operating mode, the smartphone operates in an environment with limited privileges. Applications are isolated from each other ("sandboxed") and cannot interfere with the operation of the system or other apps without the user's explicit permission. Root access breaks this isolation, allowing executable files and scripts to run at the highest level of priority. This means that any app that has received superuser permission can theoretically destroy the entire operating system.

Technically, the process of obtaining root access consists of unlocking the bootloader (bootloader) and replacing the standard recovery image (Recovery) with a modified one, for example, TWRP. It is through this modified mode that a special binary file su and a rights manager, such as Magisk or SuperSUare installed. Without these components, requests to escalate privileges are simply ignored by the system kernel.

It is important to understand that root itself is not malware. It is a legitimate tool for developers and enthusiasts. However, the presence of such rights makes the device vulnerable to viruses, which, having gained access, can steal any data, including bank details, or use the phone as part of a botnet.

⚠️ Attention: Obtaining root access on most modern smartphones irreversibly resets the security flag Knox (on Samsung devices) or similar counters on other brands. This means that even after returning to .stock firmware, some functions, such as secure folder or contactless payment, may stop working forever.

The main advantages of getting a superuser

Why do users take such risks? The main reason is the possibility of complete customization. With administrator rights, you can remove software preinstalled by the manufacturer or telecom operator (bloatware), which usually cannot be uninstalled using standard means. This frees up memory space and reduces RAM load.

Another powerful tool is the ability to manage power consumption and performance. Special applications allow you to change the processor frequency (CPU Governor), disable unnecessary cores or limit the background activity of aggressive apps. For older devices, this can be a second wind, significantly extending battery life.

Root also gives access to creating full system backups. Unlike standard cloud backups, tools like Titanium Backup or modules Magisk allow you to save not only application data, but also their settings, as well as the operating system itself in working order for quick recovery.

• 🚀 Complete removal of system junk and pre-installed applications that take up space and resources.
• 🎨 Deep interface customization: changing fonts, animations, boot logo and system sounds.
• 🛡️ Installing powerful firewalls and ad blockers at the system level for all applications and browsers.
• 💾 Creating complete system images (Nandroid backup) to instantly roll back any changes.

Risks and disadvantages of root access

Despite the tempting prospects, the other side of the coin looks quite harsh. The first and most obvious disadvantage is the loss of warranty. Service centers can easily determine whether the software has been tampered with, and in the event of a hardware failure, you may be denied free repairs. Restoring the factory firmware does not always reset the special bit that records the fact of hacking.

The second critical point is the security of financial transactions. Many banking applications, such as SberBank Online, Tinkoff or Google Pay, use the service Google SafetyNet (now Play Integrity API). If they detect root access or an unlocked bootloader, the application will simply refuse to launch. Although there are workarounds (for example, through settings Magisk Hide), it is a constant game of cat and mouse with bank developers.

In addition, there is a risk of “bricking” the device. One mistake when flashing a modified kernel or deleting a critical system file can cause the phone to stop turning on. Recovery in this case is often only possible through complex tools like EDL mode or paid service boxes, which requires high qualifications.

Option	Without root access	With root access
Guarantee	Saved	Most often canceled
Banking applications	Work stably	Can be blocked (required disguise)
Over-the-air (OTA) updates	Come automatically	Usually blocked or lead to an error
Data security	High level of protection	Reduced, vulnerability to malware
Uninstalling system applications	Impossible	Full access to uninstall

⚠️ Attention: After receiving root access, automatic system updates (OTA) usually stop work. Trying to install an official update on top of a modified system may result in a cyclic reboot. Always check the compatibility of updates on developer forums.

Popular rooting tools

The market for rooting tools is constantly changing. What worked five years ago may not be useful today. Previously, universal apps like KingRoot or OneClickRoot, which set rights in one click from the computer, were popular. However, on modern versions Android (starting from 10 and higher), these methods practically do not work due to enhanced bootloader protection.

Today, the gold standard is considered to be a combination of an unlocked bootloader, custom recovery TWRP and a manager Magisk. Magisk is unique in that it uses a “systemless root” system. This means that it does not directly modify the system partition, but loads its files during the boot process (boot image). This makes it easier to hide the fact of obtaining root access from banking applications and pass security checks.

For devices on processors MediaTek or Qualcomm specific utilities are often used, such as SP Flash Tool or QFILthat allow you to directly write modified images to the phone memory. This method requires precise knowledge of the device model and firmware version, since using the wrong file can fatally damage the partition. Instead, they are embedded in the boot image (boot.img). This allows you to remain invisible to applications that check the integrity of the system, and maintain the ability to receive OTA updates (if configured correctly). boot or recovery.

What is Systemless Root?

Systemless root is a method of gaining privileges in which the superuser's files are not copied to the /system partition. Instead, they are embedded in the boot image (boot.img). This allows you to remain invisible to applications that check system integrity and retain the ability to receive OTA updates (if configured correctly).

Step-by-step strategy for secure rooting

If you are determined to get superuser rights, you need to act as carefully as possible. There is no universal instruction, since the process is different for each smartphone model (Xiaomi, Samsung, Pixel). However, the general logic of actions is always the same. The first step is always to create a full backup of all important data, since unlocking the bootloader almost always involves a complete reset of the device (Wipe Data).

Next you need to enable USB debugging mode. To do this, go to Settings → About phone and click on the build number seven times to activate the developer menu. Then in the menu that appears For developers activate the item USB debugging. This will allow the computer to send commands to the device through the interface ADB.

The next step is unlocking the bootloader. On some phones (for example Xiaomi) this requires a special utility and a wait of 7 to 30 days. On others (for example Google Pixel) this is done with a simple command in Fastboot mode. Only after successful unlocking can you flash custom recovery and the file itself with root access.

fastboot flashing unlock
fastboot flash recovery twrp.img
fastboot reboot

After rebooting into Recovery mode (Volume Up + Power), you need to flash the archive from Magisk. After this, the phone will reboot and the Magiskicon will appear in the application menu. The presence of this icon and the “Installed” status inside the application mean that the process was successful.

⚠️ Attention: The interfaces of the Recovery menu and Fastboot commands may differ depending on the manufacturer and version of Android. Always check the official documentation or authoritative threads on the 4PDA/XDA forum before entering commands.

How to remove root access and return the warranty

Sometimes it becomes necessary to return the device to its original state, for example, before selling or visiting a service center. If you used Magisk, the removal process is as simplified as possible. Inside the application there is an “Uninstall” button, which automatically restores the original boot image and removes all traces of the superuser.

However, it is worth remembering that removing root access does not always restore the device to its factory status completely. The flag Knox on smartphones Samsung is a physical fuse that is triggered once during the first hacking attempt. Resetting rights will not return this flag to its original position, and functions that depend on it will remain blocked.

To completely return to the factory state, it is often necessary to flash the device with stock firmware via a computer. For Samsung the app is used Odin, for Xiaomi — MiFlash. This process will erase all user data and return the phone to its “out of the box” state, including the original bootloader and recovery.

• 🔄 Using the “Full Delete” function inside the Magisk application for an automatic reset.
• 💻 Flashing the stock image via a PC using specialized software (Odin, Fastboot).
• 🔒 Re-locking the bootloader with the command fastboot oem lock (not on all devices).

Does root affect the speed of the smartphone?

Root itself does not speed up the phone. However, it does provide tools to overclock the processor or remove background processes, which can improve performance. Inept use of these tools, on the contrary, can lead to unstable operation and overheating.

Is it possible to get root without unlocking the bootloader?

On modern devices (Android 8.0 and higher) this is almost impossible. Unlocking the bootloader is a prerequisite for implementing superuser rights, since a bootloader signed by the manufacturer will not allow running a modified kernel.

Is it safe to use banking applications with root?

By default - no. Banks block access. However, using Magisk Hide and modules (for example, Universal SafetyNet Fix) you can hide the presence of rights. But this does not give a 100% guarantee, since banks are constantly updating detection methods.

What to do if the phone does not turn on after the firmware?

Try to enter Recovery mode and do Wipe Cache/Dalvik. If it doesn’t help, you will need to flash the stock image via a computer in Download Mode (for Samsung) or Fastboot (for others).

Do you need root on Android 13-14?

The need for root has decreased as the system has become more functional. However, for deep automation (Tasker), blocking ads in all applications and saving old devices, root is still relevant.