I fly SAA and BA/COMAIR in the Southern African region as self loading cargo.
The above do not allow cd players at any time,allow laptops in cruise flight, but are quite causual about cellphones PRIOR to start up. I agree that cabin announcements should be modified and strengthened about switch off BEFORE you even enter the cabin. I intend to take this up the the Aircrew on the next flight with both airlines and see what they have been told is policy.