[N00b] Rooting my S8+ - Samsung Galaxy S8+ Questions & Answers

Hello everybody!
I'm new on this stuff of rooting my s8+ Phone (SM-G955FD-Exinos), actually i can get the root, installin magisk and that sfuff, everything is ok, but when i restar my Phone, got a bootloop, the phone says "only official released binaries are allowed to be flashed ", well after that and 2 days with my phone dead, i finally can install the Official rom from Samsung and bring my phone alive, obiously without Root
I was searching about, and that happen because my Firmware is the latest update from samsung, the G955FXXU4CRK1, so its the 4 Binary, i found that i just can get root in the Binary 1 but when i try to flash that binary, Odin Says i have the binary 4 and cant instal the 1 Binary.
So, i just want to know, if i can get root for my firmware and after root the phone i can restart it witouth get a bootloop, of maybe i can Downgrade my Firmware to 7.0 and get fully root there?
Thanks in advance for your time and help.,

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https://forum.xda-developers.com/ve...ot-guide-verizon-s7-s7-edge-sm-g930v-t3411015
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