How to get root access on Samsung with Android 11: safe algorithm and pitfalls

Getting root access on smartphones Samsung s Android 11 is a task that requires not only technical skills, but also an understanding of the consequences. Unlike newer OS versions, Android 11 on Samsung devices (for example, series Galaxy S20, Note 20 or A51) also supports classic rooting methods, but with a number of nuances. The manufacturer actively blocks such manipulations through Knox, RMM and bootloader protection, so standard tools like KingRoot are useless here.

This article will not just list the steps - it will explain why some methods stopped working after security updates, how to bypass restrictions Samsung without bricking the device, and what to do if they stopped working after rooting Samsung Pay, Secure Folder or banking applications. We will also look at alternatives to full root for those who only need certain functions (for example, removing a blower or backup Nandroid).

⚠️ Warning: The process violates the guarantee, resets Knox (which blocks some functions Samsung), and may result in data loss. On devices with Exynosprocessors, the chances of success are higher than on Snapdragonmodels for the USA/China (due to a locked bootloader).

1. Preparing your device: what you need to do BEFORE rooting

The first step is to check the compatibility of your device. Not all models Samsung on Android 11 can be flashed with custom firmware. For example, smartphones with a processor Snapdragon 865 (for example Galaxy S20 Ultra for the USA) have a locked bootloader that cannot be officially unlocked. At the same time, Exynosversions of the same models (for example, SM-G988B) support unlocking via OEM Unlock.

To avoid errors, follow these steps:

• 📱 Check the device model in Settings → About phone → Model. Write down the exact number (for example SM-G981B, and not just "Galaxy S20").
• 🔍 Find out the bootloader version: enter in the phone number *#1234# and look lines AP, CP, CSC.
• 🔋 The battery charge must be at least 70%. Interrupting the process due to a discharge can turn the phone into a “brick.”
• 💾 Make a full backup of your data via Samsung Smart Switch or TWRP (if already installed).

Also make sure that the option is unlocked on the device OEM Unlock in the developer menu. To do this:

1. Activate developer mode: Settings → About phone → Software information → Build number (press 7 times).
2. Return to Settings → Developer options and turn on OEM Unlock.
3. Connect your device to the Internet (Wi-Fi or mobile network) - Samsung may request confirmation of unlocking.

⚠️ Attention: On some devices, the option OEM Unlock may disappear after a reboot or software update. This is due to the work of RMM (Remote Mobile Management) - protection Samsung, which blocks the bootloader from unlocking 7 days after resetting the settings. If the option is missing, try:

• Wait 7 days from the last reset.
• Use Combination Firmware to bypass RMM (more details in the section about errors).

2. Unlocking the bootloader: the step that changes everything

Unlocking the bootloader is the most critical step. After this operation, the counter is reset Knox (transition to state 0x1), which leads to:

• 🚫 Loss of warranty.
• 🛡️ Blocking Samsung Pay, Secure Folder, Samsung Health.
• 🔒 Impossibility using official updates over the air (OTA).

To unlock the bootloader:

1. Turn off the device.
2. Press Volume up + Volume down, then connect the USB cable to the PC. Hold the buttons until the screen appears. Warning.
3. Press Volume up to confirm unlocking. The device will reset to factory settings.

After unlocking, the phone will reboot to stock firmware. Now you can start installing custom recovery (TWRP) and Magisk.

3. Installing TWRP and Magisk: step-by-step guide

For rooting you will need:

• 🖥️ Computer with installed drivers Samsung USB Drivers i ADB/Fastboot.
• 📦 File TWRP for your model (download only from the official website twrp.me).
• 📱 Latest version Magisk (for example, Magisk v26.4).
• 🔧 Tool Odin (version 3.14.4 or newer).

Step 1: Installing TWRP via Odin

1. Download .tarfile TWRP for your model.
2. Run Odin in administrator mode.
3. Connect the phone in Download Mode (press Volume down + Bixby + Power with the device turned off).
4. V Odin click AP and select the file TWRP. Uncheck Auto Reboot.
5. Click Start. When finished, disconnect the device.

Step 2: Installation Magisk

1. Immediately after the firmware TWRP press Volume up + Powerto get into recovery.
2. V TWRP select Install and flash the file Magisk (.zip).
3. Reboot into the system. If the phone is stuck on the logo, repeat the steps using Magisk-patched kernel (instructions below).

⚠️ Attention: On some devices (for example, Galaxy S20 Ultra) the stock core may conflict with Magisk. In this case you will need:

1. Download the original boot.img for your firmware.
2. Process it via Magisk Manager (option Patch Boot Image).
3. Flash the received file via Odin to slot AP.

What to do if TWRP is not installed?

If Odin issues error FAIL (Auth), it means your model does not support custom firmware. An alternative is to use Magisk without TWRP via patch boot.img. Details in the next section.

4. bootloaders)

If your device does not support TWRP (for example, Snapdragonmodels for the USA), you can get root through a patch boot.imgThis method works even with a locked bootloader, but requires caution.

Instructions:

1. Download the firmware for your model from the website samfw.com or sammobile.com (choose the same version that is installed on the phone).
2. Extract the file from the archive boot.img.lz4 (or boot.img) and decode it using lz4 (tool included in Magisk).
3. Transfer boot.img to your phone and open in Magisk Manager (section Install → Select and Patch a File).
4. Copy the received magisk_patched.img to your PC.
5. Flash the file through Odin to slot AP, disabling Auto Reboot.
6. Immediately after flashing press Volume up + Powerto get into the stock recovery, and reset the data (Wipe Data/Factory Reset).

⚠️ Critical: If after reboot the phone is stuck on the logo Samsung, then the patch boot.img passed incorrectly. In this case:

• Repeat the process with another version Magisk (for example, v25.2 instead v26.4).
• Check that the firmware matches the current version Android on the device.

5. Checking root access and solving typical problems

After successful installation, check for root access using the application Root Checker or the command in ADB:

adb shell su

If the command returns # (and not $), then root received.

Typical problems and solutions:

Problem	Cause	Solution
Phone does not turn on after firmware	Incompatible boot.img or TWRP	Flash stock firmware via Odin (file AP)
Magisk not installed	Outdated version or damaged file	Download the latest version from github.com/topjohnwu/Magisk
Banking applications do not work	SafetyNet does not pass verification	Install the module MagiskHide Props Config and activate MagiskHide
Samsung Pay does starts	Counter Knox 0x1	Restore Knox impossible, use alternatives (Google Pay)

To bypass SafetyNet (necessary for Google Pay, Netflix i banking applications):

1. In Magisk Manager enable the option MagiskHide.
2. Install the module Universal SafetyNet Fix.
3. Reboot the device and check the status via SafetyNet Test.

6. Risks and how to minimize them

Obtaining root access to Samsung s Android 11 is associated with risks that are divided into three categories:

1. Hardware risks:

• 💥 "Hard Brick" - the device does not turn on even in Download Modemode. Most often it occurs due to incompatible firmware TWRP or boot.img.
• 🔋 Damage to the battery during prolonged manipulations with the firmware.

2. Software limitations:

• 🚫 Blocking Samsung Knox (irreversible).
• 🛡️ Loss of support for OTA-updates.
• 📱 Inability to use some functions (for example, Secure Folder or Samsung Health).

3. Security:

• 🔓 Vulnerability to malware (root gives applications unlimited access).
• 🕵️ Risk of data leakage when using unofficial firmware.

To minimize risks:

• 📌 Use only trusted sources for downloading TWRP i Magisk.
• 🔄 Regularly create backups via TWRP (Nandroid Backup).
• 🛡️ Install a module Magisk for ad blocking (AdAway) and malware protection (MagiskSU).

7. Alternatives to full rooting

If your goal is to remove pre-installed applications, make a backup, or change system settings, consider these. options:

1. Removing the blaster without root:

• 📦 Use ADBcommands to deactivate system applications:

adb shell pm uninstall -k --user 0 com.samsung.android.bixby.agent

Replace com.samsung.android.bixby.agent with the package of the desired application (the list can be obtained via adb shell pm list packages).

2. Backup without TWRP:

• 💾 Application Swift Backup (requires root only for backup of applications with data).
• 📁 For backup of media files and documents, Samsung Smart Switch or Google Drive.

3. Changing system settings:

• 🎨 Substratum + Andromeda for themes (works without root on some firmware).
• 🔊 ViPER4Android to improve sound (requires Magisk, but not full root).

⚠️ Attention: Even these methods may interfere with the operation of some functions Samsung. For example, deactivation com.samsung.android.knox.analytics may lead to errors in Samsung Health.

8. Frequent errors and their solutions

Even if you follow the instructions exactly, errors may occur. Here are the most common ones and how to correct them:

1. Error Custom binary blocked by FRP lock:

• 🔐 Reason: Enabled Factory Reset Protection (FRP) and/or RMM.
• 🛠️ Solution: Wait 7 days after reset or flash Combination Firmware to bypass RMM.

2. Magisk not passes SafetyNet:

• 🛡️ Reason: Outdated version Magisk or missing module Universal SafetyNet Fix.
• 🛠️ Solution: Update Magisk and install the module via Magisk Manager.

3. The device is stuck on the logo Samsung:

• 🔄 Reason: Incompatible boot.img or interrupted firmware.
• 🛠️ Solution: Flash the stock firmware via Odin (files BL, AP, CP, CSC).

4. The mobile network does not work after rooting:

• 📶 Reason: Damaged modem (file CP in Odin).
• 🛠️ Solution: Flash the original file CP from the stock firmware.

If none of the solutions helped, try:

1. Find a thematic thread on XDA Developers for your model.
2. Reset the device to factory settings via TWRP (Wipe → Format Data).
3. Contact a service center (but do not mention rooting - this will void the warranty).

💡

90% of errors during rooting Samsung related to incompatibility of firmware files. Always check the version Bootloader i PDA before flashing the firmware.

FAQ: Answers to frequently asked questions

Is it possible to root a Samsung with Android 11 without losing data?

Technically yes, but it's risky. To do this you need:

1. Create a backup via TWRP (if already installed).
2. Use Magisk in mode Direct Install (without firmware boot.img).

However even in this case, failures are possible, so it is more reliable to make a full backup and reset.

Will Samsung Pay work after rooting?

No. Samsung Pay tied to Knoxwhich is reset to 0x1 after unlocking the bootloader. Alternatives:

• 💳 Google Pay (works after passing SafetyNet).
• 🏦 Bank cards in Google Wallet.

How to return everything back and remove the root?

To completely remove the root and return the device to stock status:

1. Download the original firmware for your model from samfw.com.
2. Flash it through Odin (all files: BL, AP, CP, CSC).
3. Reset the data (Factory Reset).

⚠️ Knox remains in state 0x1 —this is irreversible.

Is it possible to update Android after rooting?

Yes, but not through OTAOptions:

• 📥 Download the full firmware and flash it through Odin (the root will disappear).
• 🔄 Wait for the custom firmware with the new one Android (for example, LineageOS).

After the update you will need to re-install Magisk.

Which Samsung models on Android 11 definitely support root?

List of models with confirmed support (at the time of writing):

• 📱 Galaxy S20 (Exynos, models SM-G98xB).
• 📱 Galaxy Note 20 (Exynos, models SM-N98xB).
• 📱 Galaxy A51 (SM-A515F).
• 📱 Galaxy S10 (all models except Snapdragon for the USA).

For Snapdragon-models (for example, SM-G981U, SM-N981U) root is only possible through exploits (for example DirtyCow), but this is a temporary solution.