I remember ECM working a little differently in bf3 you would use it right when your enemy got a lock. But now it seems like you should use it right when the enemy missile is shot. Am I correct?
So, what I get from this is ECM=good for helis, and probably flares are better jets?
You can still use the same concept for jets. However, its trickier.
But Im not sure if the same mechanics work in bf4.