Finally, Exynos Galaxy S8 Gets DualBootPatcher Support.For those users that do not know about DualBootPatcher, it is an open source tool which works with the existing code so the ROMs are not required to explicitly support it. Its main purpose is to let you install multiple ROMs on a single Android device.
We have access to DualBootPatcher, thanks to XDA’s Senior Member yshalsager who has released their port of this software for Exynos Samsung Galaxy S8 which will allow you to patch the kernel and then the desired ROM so that it can easily be installed as a secondary ROM. It also changes SuperSU so that it can work as a secondary ROM as well.
As we have already mentioned, this is only for Exynos Variant Of Galaxy S8, so don’t try this on Qualcomm Snapdragon 835 variant.This is not as simple as flashing a custom ROM, so recommend users to follow the proper guide.We have linked the official Xda link below where you can find the Exynos Galaxy S8 DualBootPatcher download link and step by step guide.