Have the Mavic Pro 2....Upgraded to the Smart Controller....no problem pairing...went to switch back to the original controller from smart controller and could not accomplish.
In the doing so I had a time getting smart controller back paired to the mavic pro 2.
Only reason to switch back is that the original controller I had the flight simulator. Which I believe the smart controller app does not have a flight simulator.
Like the simulator to practice maneuvers and getting good at stick manipulation as to become absolutely second nature.
I am afraid to try repairing original controller now do the fact a may not get the Smart Controller back paired then the Drone is inoperative.
Please any suggestions

When you get things figured out, you should do a range test. I have a smart controller and I suspect that I don't have as good of signal at distance. I only have the smart controller though, so I can't compare