Thanks to the geiti94 (XDA Senior Member) for sharing the rooting guide. By rooting your handset, you can easily install Custom ROM, flash custom modules, etc. Additionally, you can overclock/underclock device performance, improve battery life, RAM Management process, and more. Make sure that this guide is only for Exynos Samsung Galaxy S20 Ultra.
What is Rooting?
Rooting is the process of gaining full admin control of the Android device. You can use the device to its full potential,‘Rooting’ means giving yourself special privilege or “root permissions” on your phone. It’s similar to running programs as administrators in Windows.
For more information about Android rooting, check out our detailed post here > What Is Rooting Android Phone? Advantages And Disadvantages
Disclaimer
RootMyGalaxy.net is not responsible for any damage happened to your device(s) while following this guide so please proceed at your own risk. However, we would be happy to help with any problems within our reach. Important Note: Without TWRP, you can’t flash the root files like Magisk. Now, we have to manually modify the stock boot image by patch to get root access on the device
How to Root Samsung Galaxy S20 Ultra (Exynos Variants Only)
#1 Unlock the bootloader
First, unlock the bootloader of your device, guide: How To Unlock Bootloader Of Any Android Using Fastboot Commands
#2 Reset Device
Power up your phone. Connect to the internet and complete the initial set up process without accounts. Restart your device again in download mode and flash the tar file with the kernel using ODIN tool. (Similar Steps) Next, restart your device in Recovery mode and make a factory reset. Finally, boot up your Galaxy S20 Ultra and complete the setup process. Sign in with your account by connecting to the internet.
#3 Patch boot image
Move the boot.img to your device’s internal storage. Download & install the latest Magisk Manager on your device Open magisk manager, On the main screen, select Install > Install > Patch Boot Image File Now select the boot image (boot.img). Magisk will start to patch the boot image. After completion, the file will be saved as “magisk_patched.img” in your Downloads folder
#4 Finally, Root Galaxy S20 Ultra
Connect your device to PC and transfer the “magisk_patched.img” file to the internal storage of the device (ROM folder). Use 7Zip to archive the .img file to .tar file which is compatible with Odin Flash Tool. Now, you have to download and install the ODIN Flash Tool on your PC. Make sure to install the latest Samsung USB Drivers on your computer also. Boot your Samsung Galaxy S20 Ultra into Download/Odin Mode with this similar guide. Connect your handset with the PC using a USB cable. When your device is connected, launch the ODIN tool. Next, load the magisk-patched.tar file in the AP section. Click on Options tab > select Auto Reboot and F.Reset Time. DO NOT select the Re-Partition. Finally, click on Start to initiate the rooting process on your device. Once done, your phone will restart automatically and will boot into the system. Congrats! Your device is now fully rooted.
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