How to do a hard reset on SAMSUNG G955U Galaxy S8+? - HardReset.info
How To Reset Samsung Galaxy S8 - Hard Reset and Soft Reset - YouTube
How to Boot Your Galaxy S8 or S8+ into Recovery Mode or Download Mode « Android :: Gadget Hacks
Help: I have a galaxy s8 which I factory reset it (I don't have any prior experience with this phone) and the cellular doesn't work is there any fix ? : r/samsunggalaxy