This is the first time that I have come across a mixture check (really!).
Cessna 182T Lean for taxiing. "Set 1200rpm, lean for maximum revs. Reset 1000rpm."
Cessna 310R has Mixture check. Must be others.
Phone off is a legal requirement in UK
It is a b***** nusance. Zip zipzip, and I have seen it interfere with the localiser needle.
BPF A lot of good reminders there.
D.O.