You are right. The correct sentence should have been “revert to android, update to 9 and…”
More than a ‘test’ a real life scenario with my main device where I am reporting how things went with SFOS 4.6 over android 8.
As I never had android 9 installed, I cannot know if any issue was due to operators problems or the old android layer. So I share the info as it is.
But I stress that was an issue that showed up with one network only (HR 01) and (for what it’s worth) my IMPRESSION is that it was not an android layer problem, as everything else (including connectivity anywhere else I travelled) has been working perfectly.