Yeah that would be easy and effort lessI haven't seen it in the wild yet.
Try contacting OnePlus support and they will use the tool for you remotely.
You can grab a copy at the same time.
My phone is the Chinese version GM1900,But I want to upgrade the oxygen OSYeah that would be easy and effort less
Just contact support saying you want to go to OOS, that local upgrade of OOS builds over H2OS don't work and they will send you an email with unbrick tool package link. When L2 support will remote in your computer, keylog them so that after the end of the session you can download the file back, use the password and then have a copy you could share here.My phone is the Chinese version GM1900,But I want to upgrade the oxygen OS