Before I had a driver I used to use a bluetooth handsfree. Because I have long hair that covers my ears well, no one could see it.
Once I got caught, as I am generally an expressive and emotional chap and I was talking animatedly. When he pulled me over, while parking I removed the handsfree and threw in under the seat. This was before i was a member here.
Sam:
Kya hua Bhaisaab?
Policeman:
Aap mobile phone pe baat kar rahe the
Sam:
Nahi, sir, kahaan? Phone toh andar hai
Policeman:
Handsfree pe
Sam:
Nahi, mein toh gaana gaa raha tha.
Policeman:
Aap musician hai?
Sam:
Yes sir. 
Policeman:
OK OK jao.