Update from 8.1.0 and unroot

[vanzant83]

Hello guys, some time after i bought the phone i rooted It and i keep updating It for like a year but since it must be a manual procedure after a while i just stopped. Now i need to install a bank app who require to have the phone unrooted. I know there's a thread about how to unroot the phone but i'm in an old OS, Oreo 8.1.0, oxygen 5.1.1.. What i suppose to do?Should i update it first to the last oxygen first? Should i do that step by step, and if yes where can i find all the files? Or maybe should i just unroot now and then the download the ota? I have no clue, and i'm very rusty on modding, i need some help :crying: