Please do read this really good post by BrotherHood. I think you all need to know repeating one thing doesn't make it true which blind samsung fans are doing in this forum.
bro not like that ... see i even install software sometimes from wifi or mobile data.. but where samsung provides non A/B partition type ota then it's not proper process ..because we samsung users don't have revert back issues in bootloader or something if bychance samsung loop hole formations came... you can see that this forum is full with various issues and note9 like device even note20 display damaged forever just after software update... it's not possible that 2 same type of device show difference issue just after upgrading same firmware... service center preferre Odin only which is their official software... a software update allaways needs stable carrier to upload hence obviously firmware flash is better as software will installed correctly... for those reasons only Google itself mandate A/B partition type ota for all companies after Android 11 .... it happened with samsung before also in the year of 2013 14 ...then samsung introduced samsung kies ...later they introduced smart switch
