There are differences in behavior between one Samsung and another.
Don’t write only Samsung Galaxy Tab S2, it says nothing, because is true and also not true!
Apart from the differentiation between 8 “and 9.7”, there are at least 4 variants, and this is the cause of different behaviors and different repeatable problems.
Versions with and without 4G/LTE, and with different electronics, Chipset, CPU, GPU, have their importance and great influence on the behaviour.
Even the Android OS version could change the games.
These are the different versions I well know of S2, and each name begins with the suffix SM- (for example: SM-T815)
8 inch:
T710 [Wi-Fi], T715 [4G/LTE] and T713 [Wi-Fi], T719 [4G/LTE]
9.7 inch:
T810 [Wi-Fi], T815 [4G/LTE] and T813 [Wi-Fi], T819 [4G/LTE]
The most problematic, instable or unusable (and that is likely to drive you crazy) with DJI GO 4 apps, moded or not, and DJI remote controller are these: T713, T719, T813, T819.
Even when you are thinking to have finally discovered a tricky way on how make DJI GO 4 work and show your drone connected, you can aspect the next time or in the near future to be stopped again and it refuse to be connected, even after repeated restarts of all, tablet, RC and aircraft.
Seems to be a random instabilty, but this happens very frequently with the same discomforting results, ambiguous results, initially good, later not anymore, as if something happened in the cache memory or in the system preferences that create conflicts.
If you want to be ready to fly, without having these unacceptable obstacles stopping suddenly your DJI drone to ground, these Samsung tablet are probably the worst solution, despite their strong point of a good visibilty under strong light and sun.
So, if you want a good Galaxy Tab S2 for your DJI GO 4 app, these are the compatible versions:
Size 8": T710, T715
Size 9.7": T810, T815
AVOID ALL THE OTHERS!