Quando eu ligar, não quero que outra parte grave minha voz. Como posso fazer isso?
When I call, I don't want other party to record my voice. How can I do that?
You can't do anything about it but as a precaution you can follow some tips
Not to mention bug is SS7 protocol for cellular communications.
I have not seen any method to record these calls but this is not a full proof solution just a precaution. He can easily record it via putting call on loudspeaker and recording it form another device.
But you will be alert if someone does this because there will be echo of your own voice on loudspeaker.