Perhaps try this thread, seems to be more active.
DJI GO 4 MOD 2.0 | DJI GO 4 MOD LITE [ Additional Features | Android | App Ver. 4.1.15 ]
I’m interested in this answer as I am about to purchase a Spark in SA.
So.. I tried the MOD 2.0 app on a Samsung S8. Happy days.. The drone flew as it used to. I did still get the warnings of a Poor transmission signal at 400m.. but the feed was great and I managed to go 1200m before I turned back. No problems with the feed or remote connection to the drone.