This guide will involve unlocking the bootloader of your Galaxy S20, which will factory reset the phone and wipe all of your data. Also, it is known that U.S. models (U/U1) of the Galaxy S20 series cannot be unlocked. This guide is rather involved with many steps to follow, so we advise reading very carefully before proceeding so you understand everything that is required. The methods given are tried and tested as working, but you assume all risk if something goes wrong. Requirements:
Latest Samsung Odin softwareSamsung Android USB driverLatest firmware package (try SamMobile, SamFirm, or other firmware websites)Vbmeta_disabled.tarMagisk Manager (Canary build mandatory)
Eligible Galaxy S20 models
Exynos models:
SM-G980F or SM-G980F/DS (S20)SM-G981B or SM-G981B/DS (S20)SM-G985F or SM-G985F/DS (S20+)SM-G986B or SM-G986B/DS (S20+)SM-G988B or SM-G988B/DS (S20 Ultra)
Snapdragon models:
SM-G9810 (S20, Hong Kong, Taiwan, China mainland)SM-G9860 (S20+, Hong Kong, Taiwan, China mainland)SM-G9880 (S20 Ultra, Hong Kong, Taiwan, China mainland)SM-G981N (S20, Korea)SM-G986N (S20+, Korea)SM-G988N (S20 Ultra, Korea)
Unlocking your Galaxy S20
If your bootloader was not successfully unlocked, you can try carefully following all of the above steps again incase you made a mistake somewhere, if it doesn’t work, your Galaxy S20 model may not support bootloader unlocking. Important note from XDA thread: If you don’t re-lock bootloader or re-enable the Android Verified Boot, you will not lose your data. Be aware, a stock firmware package contains a Android Verified Boot Metadata Image (vbmeta.img) with verifications enabled. You will need to flash the vbmeta_disable image (put into USERDATA slot) along with the stock firmware (use BL, AP, CP, CSC slots) to make sure AVB is not re-enabled and the data is preserved.
Rooting Galaxy S20 with Magisk
Extracting boot (kernel) image from the firmware
Rooting Galaxy S20 with Magisk
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