Indian Version Variant only! I don't know do you get or if you have October 1st security patch it should fix the problem because I am using M30 sum are using M31, M30 and A series phone and the update is much better there is battery drain but it has reduced and no heating if you are having heating issues as well also there might be some new features! Or it might Ulta for you! Ulta means bad things will happen in this Update!
make sure you download update on stable Internet connection and try not to pause in between but i paused mine once twice due to speed issue with my normal usage but yes there was no issue
I have updated many days ago it is good. I didn't face any issue.
