Well written article here: https://forums.oneplus.net/threads/...oader-install-custom-recovery-and-root.64487/
That guide is produced by JuanLitvin and his buddies unfortunately it's not written by JuanLitvin (which he has his previous guide written in a neat and understandable way), I will be waiting JuanLitvin to re-write the guide (I believe he's gonna do it today), the current guide wasn't clearly written, and many were already bumped into issues halfway through.This guide appears to walk through rooting without unlocking the bootloader. Is that possible?