How to obtain root access on Android 8.1.0: Expert guide

Owners of smartphones and tablets running the Android operating system version 8.1 Oreo often face artificial restrictions imposed by manufacturers. The standard interface does not allow you to remove pre-installed software, change system fonts, or make complete backups of applications while preserving all data. It is to solve these problems that users are looking for ways to get root access to Android 8.1.0 in order to unlock the full potential of their device.

The rooting process in this version of the system differs significantly from earlier releases due to the introduction of the Project Treble mechanism and enhanced bootloader protection. root access (superuser rights) give unlimited access to the file system, but require careful handling with system partitions. Before taking active steps, you need to clearly understand the security architecture Android 8.1 and the possible consequences of interfering with the kernel.

In this article we will analyze in detail all the stages of obtaining administrator rights, from unlocking the bootloader to installing a rights manager. You will learn about the differences between PC methods and mobile utilities, and also understand why the old methods no longer work on modern firmware. Preparedness for the risk of loss of warranty is the first condition for successfully modifying the system.

Preparation of the device and necessary tools

Before starting any manipulations with the system partition, it is critical to back up all personal data. The process of obtaining superuser rights often requires completely clearing the device's memory, so save contacts, photos and documents in the cloud or on your computer. Make sure that the battery charge is at least 70%, as a sudden power outage during the firmware can lead to irreversible damage.

You will need a high-quality USB cable, preferably an original one, and a computer with a Windows, macOS or Linux operating system. You need to install ADB and Fastboot drivers on your PC, which ensure communication between the computer and the smartphone in debugging mode. Without correctly installed drivers, no rooting utility will be able to recognize the connected device.

You also need to activate the hidden developer menu. To do this, go to Settings → About phone and quickly click on the “Build number” item seven times. After a notification appears that you have become a developer, a new section “For Developers” will appear in the settings menu. Inside it you need to enable the option USB debugging, and also, in some cases, unlock OEM.

• 📱 Battery charge is more than 70% to prevent shutdown during the process.
• 💻 Installed ADB/Fastboot drivers on a personal computer.
• 🔌 Original USB cable for a stable connection without interference.
• ☁️ Complete backup of important data on external media.

⚠️ Please note: Unlocking the Bootloader on most devices will automatically void the factory warranty. In addition, some manufacturers, such as Sony or Huawei, may only provide unique unlock codes through official support portals, which requires account registration.

Bootloader Unlock

In Android 8.1.0, the security mechanism has been significantly strengthened, and obtaining root access without an unlocked bootloader has become almost impossible for most modern models. A bootloader is a small app that runs before the operating system starts and verifies the digital signature of the system partition. If the signature does not match the original (which happens when installing root), the system will simply refuse to boot.

The unlocking procedure varies depending on the manufacturer. For devices Nexus i Pixel this is done with a simple command via Fastboot. Brands like Xiaomi require a wait of 168 hours after linking your Mi account. Samsung devices use the Download Mode and the Odin app, although the process of obtaining root access there often goes through flashing a modified recovery, rather than directly unlocking the bootloader in the classical sense.

To check the status of the bootloader, connect the phone to the PC in Fastboot mode and enter the command fastboot oem device-info. If you see Device unlocked: falsein the response, it means the blocking is active. To remove restrictions, the command most often used is fastboot flashing unlock or fastboot oem unlock. A risk warning will appear on the device screen, confirmation is usually carried out with the volume buttons.

What happens to the data when unlocked?

When the bootloader unlock command is executed, the system initiates a full reset (Factory Reset) for security purposes. This means that all user data, including photos, contacts and installed applications, will be permanently deleted. That is why backup is a mandatory step, ignoring which will lead to loss of information.

After successful unlocking, the device will reboot, and when you turn it on, you may see a warning that the software is not certified. This is normal behavior for a modified device. Now the path to installing custom recovery and obtaining superuser rights is open.

Installing custom TWRP recovery

The standard recovery menu (Stock Recovery), installed by manufacturers, has extremely limited functionality and does not allow you to make changes to system files. To install root access, you need TWRP (Team Win Recovery Project) a custom recovery with open source code. It allows you to install third-party firmware, make full backups of partitions and install zip archives with access rights.

Finding a suitable version of TWRP is an important step. You need to find the image file (.img) specifically for your smartphone model and Android version 8.1.0. Using an image from a different model or for a different version of Android may lead to the device being corrupted. You should download files only from the official project website or trusted developer forums.

The installation process usually occurs through Fastboot mode. Connect the phone to the computer, put it into bootloader mode and run the command in the terminal:

fastboot flash recovery twrp-3.x.x-x-model.img

It is important to prevent the system from automatically rebooting immediately after flashing the firmware, since the standard Android system can overwrite the custom recovery back to stock. Therefore, use a combination of buttons to immediately enter Recovery mode (usually volume down + power) or command fastboot boot twrp-3.x.x-x-model.img for the first start without writing to memory.

• 🔍 Download the exact version of TWRP for your model and region.
• 🚫 Do not allow the system to boot normally immediately after flashing recovery.
• 🔐 If TWRP asks for a password, try entering the screen unlock PIN.
• 📂 In TWRP, go to Wipe → Advanced Wipe and select Dalvik, Cache, System, Data.

TWRP's interface is touch-sensitive and intuitive. Before setting rights, it is recommended to make a full backup of the current system (Backup), selecting the Boot, System and Data sections. This will save you if the experiment is unsuccessful and a rollback is required.

Methods for obtaining root access: Magisk and SuperSU

For a long time, the de facto standard for managing root access was SuperSU, however, on Android 8.1.0 and later it has almost completely lost its relevance due to changes in the structure of system partitions and the introduction of System-as-Root. The modern, safe and recommended standard is Magisk (Magic Mask). It allows you to obtain root access without modifying the system partition (systemless root), which ensures compatibility with applications that check the integrity of the system.

Magisk works by patching the boot image. You need to download the original file boot.img from the stock firmware of your device or uninstall it from the current firmware. This file is then uploaded to the Magisk Manager application on the smartphone, where it is modified. The resulting patched image (magisk_patched.img) must be flashed back to the Boot section via Fastboot.

An alternative, but less reliable method is to use automatic snails like KingRoot or OneClickRoot. On Android 8.1.0 their effectiveness is extremely low, since they exploit kernel vulnerabilities that have long been closed in this version of the OS. In addition, such apps often contain advertising and collect telemetry, which jeopardizes the security of personal data.

Characteristics	Magisk (Recommended)	SuperSU (Outdated)	One-click utilities
Implementation type	Systemless (without changing the system)	Modification of system files	Exploitation of vulnerabilities
Compatibility with Android 8.1	Full	Partial / Problematic	Low
Hide from banks	Built-in (Magisk Hide)	Absent	Absent
Updateability	Actively supported	Project closed	Depends on the developer

⚠️ Attention: After the release of Magisk updates, the Magisk Hide functionality was moved to the Zygisk settings. If your banking applications stop working after receiving rights, you need to activate Zygisk in Magisk settings and add the necessary applications to the exclusion list (DenyList).

Checking rights and setting up access

After successfully installing Magisk and rebooting the device, you need to make sure that the rights superuser are really active. The easiest way is to open the Magisk app. If the version number is displayed at the top of the screen and there is a list of applications in the Superuser menu, then the process was successful. If the application prompts you to “Add install” or reboot, it means that the installation is not complete.

For a deeper check, you can use specialized utilities, for example, Root Checker. Launch the application and click the test button. Green screen with the message “Congratulations! Root access is properly installed" confirms that you have rights. You can also use the terminal (command line emulator) by entering the command su. If the system asks for access permission (a Magisk pop-up window appears), then you have access.

It is important to configure the access rules correctly. By default, Magisk operates in "On Demand Only" mode. This means that the first time an app tries to gain root privileges, you'll see a pop-up asking you to do so. Never grant permissions to applications you are unsure of or to system processes that do not require modification. Unsystematic distribution of rights can lead to unstable operation of the OS.

Some users are faced with a situation where there is root, but applications do not “see” it. This is often due to the fact that the “Selective loading of applications” option is enabled in the developer settings or the debugging mode is activated, which blocks access. Check your Magisk settings and make sure Zygisk is enabled if modern applications require it.

Possible problems and solutions

The process of obtaining root access on Android 8.1.0 does not always go smoothly. One of the common problems is “Bootloop”, when the phone endlessly reboots at the manufacturer’s logo. This happens if an incompatible boot image was flashed or the system partition is damaged. In this case, you need to log into TWRP and restore the system from a previously created backup or reflash the stock image via Fastboot.

Another common issue is Wi-Fi or Bluetooth not working after rooting. This is often due to loss of rights to system files or driver conflicts. The solution lies in resetting the network settings or reinstalling the stock kernel and then applying the Magisk patch using a more correct method. It is also worth checking whether the “Secure Boot” mode is activated in the BIOS-like settings of the device, which can block the modified bootloader.

If the computer stops seeing the phone in ADB/Fastboot mode after installing the drivers, try changing the USB port, cable, or installing the universal Google USB Driver through the device manager, selecting the device with a yellow exclamation mark and by updating the driver manually.

• 🔄 Bootloop can be treated by restoring from a TWRP backup or flashing the stock one.
• 📡 Problems with communication modules can be solved by resetting the network settings or flashing the kernel.
• 💻 Lack of communication with a PC is often solved by replacing the cable or reinstalling drivers.
• 🔒 The “Device locked” error when trying to flash the firmware indicates unsuccessful unlocking of the bootloader.

⚠️ Attention: The interfaces of the “For Developers” menu and the names of items in the settings may differ slightly depending on the manufacturer’s shell (MIUI, OneUI, ColorOS). Always check the documentation for your specific model, as the location of items may be hidden deep in the menu. OEM Unlocking may be hidden deep in the menu.

Frequently asked questions (FAQ)

Will banking applications stop working after getting Root?

Yes, by default most banking applications (Sberbank, Tinkoff, etc.) and payment systems (Google Pay) are rooted and refuse to work. However, using Magisk and its hiding function (DenyList/Zygisk), you can successfully bypass these checks and use applications as on a regular device.

Is it possible to get Root on Android 8.1.0 without a computer?

Theoretically, this is possible using applications like KingRoot, but on Android 8.1.0 their effectiveness is close to zero due to closed vulnerabilities. A reliable and safe way to obtain superuser rights on this version of the system almost always requires a PC to unlock the bootloader and flash the image via Fastboot.

Will Root affect the quality of photos from the camera?

The mere fact of having root access does not degrade the quality of the photo. However, if during the modification process you damage the camera's system libraries or install an unstable module that affects image processing, the quality may drop. When used correctly (Magisk), the camera works normally.

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

If the screen is black and the phone does not respond, try holding down the combination of buttons to enter Recovery mode (usually Volume Up + Power) or Fastboot (Volume Down + Power). If the device enters these modes, the phone is alive, and the problem can be solved by flashing the stock image. If there is no response at all, you may need to flash it via EDL mode (for Qualcomm) or a service center.