I have no idea how my phone has gotten this update as it was on android 8.0 before the update and my phone is now better than new it's faster and the battery lasts ages the only problem is my friend who has the same model can't get this update anyone got any answers
depending really he might have the same phone and model but his phone could be of a carrier which takes longer to get update where as your phone might be unlocked to any network.
Update: I have spoken with samsung and they have said that my phone shouldn't of had this update and said it must of been a glitch that let me install it
Yeah, it's that ROM they put on. it's 64 bit so should be faster and better optimised then the default 32 bit ROM, which was based on outdated android 8 and 32 bit I believe