I had started BATC during a climb phase.
BATC also asks which phase I am in.
After making my selection, I assumed that BATC would then select the frequency of the relevant authority itself. After all, I had set the program to select the frequency automatically.
However, this was not the case, so BATC listed requests during the climb that were completely inappropriate (such as IFR clearance).
So if the program offers to select the flight phase, it would make sense and be expected that it would also select the correct frequency automatically.
After all, BATC already knows how high I am flying and how far I am from the departure airport.
Hence my suggestion to implement this function.